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PT
1
28 tháng 6 2022
\(\Leftrightarrow\left(\dfrac{1}{8}+\dfrac{13}{4}-\dfrac{11}{4}\right)\cdot x=\left(\dfrac{3}{2}+\dfrac{65}{100}+\dfrac{7}{200}\right):\dfrac{7}{100}+7\)
\(\Leftrightarrow x\cdot\dfrac{5}{8}=\dfrac{535}{14}\)
=>x=428/7
O
4 tháng 5 2022
\(\dfrac{3}{2}x-0,2=\dfrac{3}{5}\)
\(\dfrac{3}{2}x-\dfrac{1}{5}=\dfrac{3}{5}\)
\(\dfrac{3}{2}x=\dfrac{3}{5}+\dfrac{1}{5}\)
\(\dfrac{3}{2}x=\dfrac{4}{5}\)
\(x=\dfrac{4}{5}:\dfrac{3}{2}\)
\(x=\dfrac{4}{5}\cdot\dfrac{2}{3}\)
\(x=\dfrac{8}{15}\)
\(\dfrac{1}{3}+x=\dfrac{3}{4}\)
\(x=\dfrac{3}{4}-\dfrac{1}{3}\)
\(x=\dfrac{9}{12}-\dfrac{4}{12}\)
\(x=\dfrac{5}{12}\)
\(1\dfrac{1}{2}x-\dfrac{2}{5}=\dfrac{1}{4}\)
\(\dfrac{3}{2}x-\dfrac{2}{5}=\dfrac{1}{4}\)
\(\dfrac{3}{2}x=\dfrac{1}{4}+\dfrac{2}{5}\)
\(\dfrac{3}{2}x=\dfrac{13}{20}\)
\(x=\dfrac{13}{20}:\dfrac{3}{2}\)
\(x=\dfrac{13}{20}\cdot\dfrac{2}{3}\)
\(x=\dfrac{13}{30}\)
\(\dfrac{11}{8}-\dfrac{3}{8}\cdot x=\dfrac{1}{8}\)
\(\dfrac{3}{8}\cdot x=\dfrac{11}{8}-\dfrac{1}{8}\)
\(\dfrac{3}{8}\cdot x=\dfrac{5}{4}\)
\(x=\dfrac{5}{4}:\dfrac{3}{8}\)
\(x=\dfrac{5}{4}\cdot\dfrac{8}{3}\)
\(x=\dfrac{10}{3}\)
20 tháng 5 2021
a,2/5 = 2/5 ; 3/8=6/16 ; 1/9=3/27
b, 4/3=8/6 ; -1=-1 ; -4/-2=-8/4
tick cho mik nhé
10 tháng 3 2022
1: =>x=3/5-1/5=2/5
b: =>x/3=5/8+1/8=3/4
=>x=9/4
3: =>10/3x=3+1/4+6+3/4=10
=>x=10:10/3=3
17 tháng 7 2023
a) \(\dfrac{8}{9}x=\dfrac{2}{7}-\dfrac{2}{3}=-\dfrac{8}{21}\)
\(x=-\dfrac{8}{21}:\dfrac{8}{9}=-\dfrac{3}{7}\)
b) \(\dfrac{2}{5}x=\dfrac{2}{5}-\dfrac{2}{5}=0\)
\(x=0:\dfrac{2}{5}=0\)
c)\(\dfrac{7}{8}x=\dfrac{2}{9}-\dfrac{1}{3}=-\dfrac{1}{9}\)
\(x=-\dfrac{1}{9}:\dfrac{7}{8}=-\dfrac{8}{63}\)
NM
17 tháng 7 2023
a) 2/7 - 8/9 . x = 2/3
⇒ 8/9 . x = 2/7 - 2/3
⇒ 8/9 .x = -8/21
⇒ x = -8/21 : 8/9
⇒ x = -3/7.
Vậy...
NK
25 tháng 3 2023
a, \(x\cdot\dfrac{-5}{8}=\dfrac{15}{32}\)
\(x=\dfrac{15}{32}:\dfrac{-5}{8}\)
\(x=\dfrac{-3}{4}\)
b, \(\dfrac{3}{10}:x=\dfrac{-9}{20}\)
\(x=\dfrac{3}{10}:\dfrac{-9}{20}\)
\(x=-\dfrac{2}{3}\)
c, \(\dfrac{-1}{4}x+\dfrac{4}{5}=\dfrac{3}{4}\)
\(\dfrac{-1}{4}x=\dfrac{3}{4}-\dfrac{4}{5}\)
\(\dfrac{-1}{4}x=-\dfrac{1}{20}\)
\(x=-\dfrac{1}{20}:\dfrac{-1}{4}\)
\(x=\dfrac{1}{5}\)
d, \(\dfrac{-7}{8}+\dfrac{2}{3}:x=\dfrac{3}{5}\cdot\dfrac{-5}{12}\)
\(\dfrac{-7}{8}+\dfrac{2}{3}:x=-\dfrac{1}{4}\)
\(\dfrac{2}{3}:x=-\dfrac{1}{4}+\dfrac{-7}{8}\)
\(\dfrac{2}{3}:x=\dfrac{5}{8}\)
\(x=\dfrac{2}{3}:\dfrac{5}{8}\)
\(x=\dfrac{16}{15}\)
#YVA6
Y
25 tháng 3 2023
\(a,x.\dfrac{-5}{8}=\dfrac{15}{32}\)
\(\Leftrightarrow x=\dfrac{15}{32}:\dfrac{-5}{8}\)
\(\Leftrightarrow x=\dfrac{15}{32}.\dfrac{-8}{5}\)
\(\Leftrightarrow x=-\dfrac{3}{4}\)
\(b,\dfrac{3}{10}:x=-\dfrac{9}{20}\)
\(\Leftrightarrow x=\dfrac{3}{10}:\dfrac{-9}{20}\)
\(\Leftrightarrow x=\dfrac{3}{10}.\dfrac{-20}{9}\)
\(\Leftrightarrow x=-\dfrac{2}{3}\)
\(c,-\dfrac{1}{4}x+\dfrac{4}{5}=\dfrac{3}{4}\)
\(\Leftrightarrow-\dfrac{1}{4}x=\dfrac{3}{4}-\dfrac{4}{5}\)
\(\Leftrightarrow-\dfrac{1}{4}x=-\dfrac{1}{20}\)
\(\Leftrightarrow x=-\dfrac{1}{20}\times\left(-4\right)\)
\(\Leftrightarrow x=\dfrac{1}{5}\)
\(d,-\dfrac{7}{8}+\dfrac{2}{3}:x=\dfrac{3}{5}.\dfrac{-5}{12}\)
\(\Leftrightarrow-\dfrac{7}{8}+\dfrac{2}{3}:x=-\dfrac{1}{4}\)
\(\Leftrightarrow\dfrac{2}{3}:x=-\dfrac{1}{4}+\dfrac{7}{8}\)
\(\Leftrightarrow\dfrac{2}{3}:x=\dfrac{5}{8}\)
\(\Leftrightarrow x=\dfrac{2}{3}:\dfrac{5}{8}\)
\(\Leftrightarrow x=\dfrac{16}{15}\)
NX
24 tháng 8 2023
a) \(\dfrac{-2}{3}+2x=\dfrac{4}{3}\)
\(\Rightarrow2x=\dfrac{4}{3}-\dfrac{-2}{3}\)
\(\Rightarrow2x=2\)
\(\Rightarrow x=1\)
b) \(\dfrac{5}{8}-5:x=\dfrac{-3}{8}\)
\(\Rightarrow-5:x=\dfrac{5}{8}-\dfrac{-3}{8}\)
\(\Rightarrow-5:x=1\)
\(\Rightarrow x=-5\)
H9
HT.Phong (9A5)
CTVHS
24 tháng 8 2023
a) \(\dfrac{-2}{3}+2x=\dfrac{4}{3}\)
\(\Rightarrow2x=\dfrac{4}{3}-\dfrac{-2}{3}\)
\(\Rightarrow2x=\dfrac{6}{3}\)
\(\Rightarrow2x=2\)
\(\Rightarrow x=\dfrac{2}{2}\)
\(\Rightarrow x=1\)
b) \(\dfrac{5}{8}-5:x=\dfrac{-3}{8}\)
\(\Rightarrow-5:x=\dfrac{-3}{8}-\dfrac{5}{8}\)
\(\Rightarrow-5:x=-\dfrac{8}{8}\)
\(\Rightarrow-5:x=-1\)
\(\Rightarrow x=-5:-1\)
\(\Rightarrow x=5\)
ND
Nguyễn Đức Trí
VIP
26 tháng 8 2023
a) \(\dfrac{-2}{3}+2x=\dfrac{4}{3}\)
\(\Rightarrow2x=\dfrac{4}{3}+\dfrac{2}{3}\)
\(\Rightarrow2x=2\)
\(\Rightarrow x=1\)
b) \(\dfrac{5}{8}-5:x=\dfrac{-3}{8}\)
\(\Rightarrow5:x=\dfrac{5}{8}+\dfrac{3}{8}\)
\(\Rightarrow5:x=1\)
\(\Rightarrow x=5:1=5\)
NC
1
5/8 - 3/8:x=0.65
3/8:x=5/8-13/20
3/8:x=-1/40
x = 3/8:-1/40
suy ra: x = -15
\(\dfrac{5}{3}-\dfrac{3}{8}:x=0,65\)
<=>\(\dfrac{5}{3}-\dfrac{3}{8x}=0,65\)
<=>\(\dfrac{3}{8x}=\dfrac{5}{3}-0,65=\dfrac{61}{60}\)
<=>\(x=\dfrac{61}{60}\cdot\dfrac{8}{3}=\dfrac{488}{180}=\dfrac{122}{45}\)