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a)132:x=16
x=132:16
x=8,25
b)x:14,5=7,45
x=7,45x14,5
x=108,025
hok tốt nhé
#) Giải :
a) 6,62 x \(x\)+ 3,38 x \(x\)= 5
( 6,62 + 3,38 ) x \(x\) = 5
10 x \(x\) = 5
\(x\) = 5 : 10
\(x\) = 0,5
b) \(x\)x 0,5 + \(\frac{1}{4}\)x \(x\)= \(\frac{4}{5}\)x 3
\(x\)x 0,5 + \(\frac{1}{4}\)x \(x\) = \(\frac{12}{5}\)
\(x\)x ( 0,5 + \(\frac{1}{4}\)) = \(\frac{12}{5}\)
\(x\)x 0,75 = \(\frac{12}{5}\)
\(x\) = \(\frac{12}{5}\): 0,75
\(x\) = 3,2
\(a.=\frac{36}{5}\times\frac{7}{36}\)
\(=\frac{7}{5}\)
\(b.=\frac{31}{6}\times\frac{3}{1}\)
\(=\frac{31}{2}\)
Tìm x:
\(\left(x-\frac{2}{5}\right)\times5=\frac{5}{6}\)
\(x-\frac{2}{5}=\frac{5}{6}\times\frac{1}{5}\)
\(x-\frac{2}{5}=\frac{1}{6}\)
\(x=\frac{1}{6}+\frac{2}{5}\)
\(x=\frac{17}{30}\)
a) x + 2/3=9/11
<=> x=9/11-2/3= 5/33
b) x - 3/10=4/15
<=> x=4/15+3/10=17/30
c) X x 1/7=5/6
<=> x=5/6:1/7=35/6
d) x : 3/5=1/6
<=> x=1/6x3/5=1/10
\(a,x+\frac{2}{3}=\frac{9}{11}\)
\(x=\frac{9}{11}-\frac{2}{3}\)
\(x=\frac{5}{33}\)
\(b,x-\frac{3}{10}=\frac{4}{15}\)
\(x=\frac{4}{15}+\frac{3}{10}\)
\(x=\frac{17}{30}\)
\(c,x\cdot\frac{1}{7}=\frac{5}{6}\)
\(x=\frac{5}{6}:\frac{1}{7}\)
\(x=\frac{35}{6}\)
\(d,x:\frac{3}{5}=\frac{1}{6}\)
\(x=\frac{1}{6}\cdot\frac{3}{5}\)
\(x=\frac{1}{10}\)
. là nhân nha
\(1,\) \(45:0,5-\frac{9}{4}:\frac{1}{2}\)
\(=90-\frac{9}{2}\)
\(=\frac{171}{2}\)
\(2,\)\(42+\frac{9}{2}:0,75-14,5\)
\(=42+6-14,5\)
\(=33,5\)
\(3,\)\(125\%\times\frac{3}{4}-25\%\)
\(=\frac{15}{16}-\frac{1}{4}\)
\(=\frac{11}{16}\)
\(4,\)\(\frac{19}{5}:75\%+50\%:\frac{5}{4}\)
\(=\frac{76}{15}+\frac{2}{5}\)
\(=\frac{82}{15}\)
\(5,\)\(Y\times25,5-42=48,5\)
\(\Leftrightarrow Y\times25,5=90,5\)
\(\Leftrightarrow Y=90,5:25,5\)
\(\Leftrightarrow Y=\frac{181}{51}\)
Vậy ...
\(6,\)\(1,25\times Y\times25=105,8\)
\(\Leftrightarrow31,25\times Y=105,8\)
\(\Leftrightarrow Y=105,8:31,25\)
\(\Leftrightarrow Y=3,3856\)
Vậy ...
_Chúc bạn học tốt_
a)Ta có :
x-8,7=5 x 1,2 = 6
=> x = 6+8,7 = 14,7
Vậy x=14,7
b) Ta có
x+31/10=14,5+12/10=15,7
=> x=15,7-31/10=12,6.
Vậy x=12,6
a) ( x - 8,7 ) = 5 * 1,2
x - 8,7 = 6
x = 6 + 8,7
x = 14,7
b) x + 31/10 = 14,5 +12/10