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=> x + 1/2 = 5/6 + 3/4
=> x + 1/2 = 19/12
=> x = 19/12 - 1/2
=> x = 13/12
Vậy x = 13/12
Tk mk nha
a X+1/2-3/4=5/6 suy ra : Mỉnh phải đi ngủ rồi mai mình giải tiếp cho nhé
X+1/2=5/6+3/4
X+1/2=19/12
X=19/12-1/2
X=13/12
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\(x\cdot\frac{1}{2}\cdot\frac{1}{3}=\frac{3}{4}\\ x\cdot\frac{1}{6}=\frac{3}{4}\\ x=\frac{3}{4}:\frac{1}{6}\\ x=\frac{9}{2}\)
Vậy.....
\(x\times\frac{1}{2}\times\frac{1}{3}=\frac{3}{4}\)
\(x=\frac{3}{4}\div\frac{1}{3}\div\frac{1}{2}\)
\(x=\frac{9}{2}\)
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\(\frac{1}{2}.x-\frac{3}{4}=\frac{5}{6}\)
\(\frac{1}{2}.x=\frac{5}{6}+\frac{3}{4}\)
\(\frac{1}{2}.x=\frac{19}{12}\)
\(x=\frac{19}{12}:\frac{1}{2}\)
\(x=\frac{19}{6}\)
Vậy \(x=\frac{19}{6}\)
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1/4 * 1/5 * x = 1/2
1/20 *x = 1/2
x = 1/2 :1/20
x = 1/2 * 20/1
x = 10
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Ta có: 1/1x2 + 1/2x3 + 1/3x4 +...+ 1/X x (X + 1) = 499/500
=> 1 - 1/2 + 1/2 - 1/3 + 1/3 - 1/4 +...+ 1/X - 1/(X + 1) = 499/500
=> 1 - 1/(X + 1) = 499/500
=> 1/(X + 1) = 1 - 499/500
=> 1/(X + 1) = 1/500
=> X + 1 = 500
=> X = 500 - 1
=> X = 499
Đáp số: X = 499
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\(x+\frac{3}{4}=\frac{1}{2}.\frac{2}{3}\)
\(x+\frac{3}{4}=\frac{2}{6}\)
\(x=\frac{2}{6}-\frac{3}{4}\)
\(x=\frac{-5}{12}\)
x+3/4=1/2.2/3
x+3/4=1/3
x=1/3-3/4
x=-5/12
k mik nhoa!!!!!!!!!!!!!!!!!
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\(a,\frac{5}{6}+x\)x \(\frac{3}{4}=3\)
\(x\)x \(\frac{3}{4}=3-\frac{5}{6}\)
\(x\)x \(\frac{3}{4}=\frac{13}{6}\)
\(x=\frac{13}{6}:\frac{3}{4}\)
\(x=\frac{26}{9}\)
b, \(5\frac{1}{6}-x:\frac{3}{4}=\frac{2}{3}\)
\(\frac{31}{6}-x:\frac{3}{4}=\frac{2}{3}\)
\(x:\frac{3}{4}=\frac{31}{6}-\frac{2}{3}\)
\(x:\frac{3}{4}=\frac{9}{2}\)
\(x=\frac{9}{2}\)x \(\frac{3}{4}\)
\(x=\frac{27}{8}\)
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
x = 1/3 x 3/4
x = 3/12
x:3/4=1/3
x =1/3x3/4
x =1/4