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B=\(\frac{2002.\left(14+1\right)-1}{2001+2002.14}\)=\(\frac{2002.14+2001}{2001+2002.14}\)=1
Giải hộ mình câu này với:
(215/216+3971/3972-1/5)x(-9/35+2/5-1/7)=..........................?
X - (4,5 + 2,3) = 6,9
X - 6,8 = 6,9
X = 6,9 + 6,8
X = 13,7
\(\frac{5}{8}:x=\frac{1}{2}-\frac{1}{4}\)
\(\frac{5}{8}:x=\frac{1}{4}\)
\(x=\frac{5}{8}:\frac{1}{4}\)
\(x=\frac{5}{2}\)
\(\frac{1}{9}:\left(x-1\right)=\frac{1}{4}\)
\(\frac{1}{9}:x-\frac{1}{9}:1=\frac{1}{4}\)
\(\frac{1}{9}:x-\frac{1}{9}=\frac{1}{4}\)
\(\frac{1}{9}:x=\frac{1}{4}+\frac{1}{9}\)
\(\frac{1}{9}:x=\frac{13}{36}\)
\(x=\frac{13}{36}:\frac{1}{9}\)
\(x=\frac{13}{4}\)
X x 2 + X x 0,3 = 0,69
X x (2 + 0,3) = 0,69
X x 2,3 = 0,69
X = 0,69 : 2,3
X = 0,3
a) x - ( 4,5 + 2,3 )= 6,9
x - 6,8 = 6,9
x = 6,9 - 6,8
x = 0,1
b)\(\frac{5}{8}\): x = \(\frac{1}{2}-\frac{1}{4}\)
\(\frac{5}{8}-x=\frac{1}{4}\)
x = \(\frac{5}{8}-\frac{1}{4}\)
x = \(\frac{3}{8}\)
c) \(\frac{1}{9}:\left(x-1\right)=\frac{1}{4}\)
x - 1 = \(\frac{1}{9}:\frac{1}{4}\)
x - 1 = \(\frac{4}{9}\)
x = \(\frac{4}{9}+1\)
x = \(\frac{13}{9}\)
d) X x 2 + X x 0,3 = 0,69
X x ( 2 + 0,3 ) = 0,69
X x 2,3 = 0,69
X = 0,69 : 2,3
X = 0,3
(x+1)+(x+2)+(x+3)+(x+4)=110
(x+x+x+x)+(1+2+3+4)=110
4x+10=110
4x=110-10
4x=100
x=100:4
x=25
[ x + 1 ] + [ x + 2 ] + [ x + 3 ] + [ x + 4 ] = 110
=> x + 1 + x + 2 + x + 3 + x + 4 = 110
=> ( x + x + x + x ) + ( 1 + 2 + 3 + 4 ) = 110
=> 4x + 10 = 110
=> 4x = 100
=> x = 25
2+3/4=11/4 ; 2-3/5=7/5
5/7:6=5/42 ; 5+2/7=37/7
Bài 2: a) x-1/6=1/2+1/3
x-1/6=5/6
x=5/6+1/6
x=1
b) x+1/8=1/2-1/3
x+1/8=1/6
x=1/6-1/8
x=1/24
c) x:1/2=2/3.3/4
x:1/2=1/2
x=1/2.1/2
x =1/4
a) \(x.\frac{3}{4}=\frac{4}{5}.2\)
\(x.\frac{3}{4}=\frac{8}{5}\)
\(x=\frac{8}{5}:\frac{3}{4}=\frac{32}{15}\)
b) \(x:1\frac{1}{7}=2\frac{2}{3}\)
\(x:\frac{8}{7}=\frac{8}{3}\)
\(x=\frac{8}{3}.\frac{8}{7}=\frac{64}{21}\)
c) \(x-1\frac{2}{5}=4\frac{1}{6}-2\frac{2}{3}\)
\(x-\frac{7}{5}=\frac{25}{6}-\frac{8}{3}=\frac{3}{2}\)
\(x=\frac{3}{2}+\frac{7}{5}=\frac{29}{10}\)
d) \(2\frac{2}{3}+x:\frac{3}{2}=2\frac{1}{3}\)
\(\frac{8}{3}+x:\frac{3}{2}=\frac{7}{3}\)vô lí vì 8/3 lớn hơn 7/3
x + 25% = 21/3
x = 21/3 - 25%
x = 27/4
x = 6.75
~ đúng thì tk, ko cần ủng hộ~
a, 2 : y = 1 : 3
2 : y = \(\dfrac{1}{3}\)
y = 2 : \(\dfrac{1}{3}\)
y = 6
b, 24,68 \(\times\) y - y \(\times\) 12,34 = 24,68
y \(\times\) ( 24,68 - 12,34) = 24,68
y \(\times\) 12,34 = 24,68
y = 24,68 : 12,34
y = 2
\(0,3\)x\(\left(x+\frac{3}{3}\right)=4:\frac{2}{3}\)
\(\Leftrightarrow0,3\)x\(\left(x+1\right)=6\)
\(\Leftrightarrow x+1=\frac{6}{0,3}\)
\(\Leftrightarrow x+1=20\)
\(\Leftrightarrow x=19\)
0,3 x ( X + 3/3 ) = 4 : 2/3 = 0,3 x ( X + 1 ) =6
x + 1 = 6 : 0,3
x + 1 = 20
x = 19