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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
\(\frac{1}{2}.x-\frac{3}{4}=\frac{5}{6}\)
\(\frac{1}{2}.x=\frac{5}{6}+\frac{3}{4}\)
\(\frac{1}{2}.x=\frac{19}{12}\)
\(x=\frac{19}{12}:\frac{1}{2}\)
\(x=\frac{19}{6}\)
Vậy \(x=\frac{19}{6}\)
1/4 * 1/5 * x = 1/2
1/20 *x = 1/2
x = 1/2 :1/20
x = 1/2 * 20/1
x = 10
[ 19/20 x 3/4 + 1/20 x 3/4 ] x [ 1/2 x 3/4 -2/4 x 3/4 ]
=[ 3/4 x [19/20 + 1/20 ] x [3/4 x [2/4 - 1/2]
=[ 3/4 x 1 ] x [3/4 x 0 ]
=0
\(\left(\frac{19}{20}.\frac{3}{4}+\frac{1}{20}.\frac{3}{4}\right).\left(\frac{1}{2}.\frac{3}{4}-\frac{2}{4}.\frac{3}{4}\right)\)
\(=\left(\frac{19}{20}.\frac{3}{4}+\frac{1}{20}.\frac{3}{4}\right).\left(\frac{1}{2}.\frac{3}{4}-\frac{1}{2}.\frac{3}{4}\right)\)
\(=\left(\frac{19}{20}.\frac{3}{4}+\frac{1}{20}.\frac{3}{4}\right).0\)
\(=0\)
\(a,\frac{1}{2\times3}+\frac{1}{3\times4}+\frac{1}{4\times5}+\frac{1}{5\times6}=\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+\frac{1}{5}-\frac{1}{6}\)
\(=\frac{1}{2}-\frac{1}{6}=\frac{1}{3}\)
\(b,\left(1-\frac{1}{2}\right)\times\left(1-\frac{1}{3}\right)\times\left(1-\frac{1}{4}\right)=\frac{1}{2}\times\frac{2}{3}\times\frac{3}{4}\)
\(=\frac{1\times2\times3}{2\times3\times4}=\frac{1}{4}\)
a) x+5/7=12/14
x=12/14-5/7
x=12/14-10/14
x=2/14
x=1/7
vậy x=1/7
Bạn có thể viết rõ đề bài câu b hưn đc không
k cho mình nha
\(\frac{1}{2}.\frac{1}{3}.\frac{1}{4}.\frac{1}{5}=\frac{1}{6}.\frac{1}{4}.\frac{1}{5}=\frac{1}{24}.\frac{1}{5}=\frac{1}{120}\)
\(\frac{1}{2}x\frac{1}{3}x\frac{1}{4}x\frac{1}{5}x=\frac{1}{6}x\frac{1}{20}=\frac{1}{120}\)
Nhấn đúng cho mk nha!!!!!!!!
\(x\cdot\frac{1}{2}\cdot\frac{1}{3}=\frac{3}{4}\\ x\cdot\frac{1}{6}=\frac{3}{4}\\ x=\frac{3}{4}:\frac{1}{6}\\ x=\frac{9}{2}\)
Vậy.....
\(x\times\frac{1}{2}\times\frac{1}{3}=\frac{3}{4}\)
\(x=\frac{3}{4}\div\frac{1}{3}\div\frac{1}{2}\)
\(x=\frac{9}{2}\)