Question

a, 2/3:x-1/2=1/3

B, 3/4.x+2/5=5/2

jup mk nha

Answer 1

a)

\(\frac{2}{3}\div x-\frac{1}{2}=\frac{1}{3}\)

\(\Rightarrow\frac{2}{3}\div x=\frac{1}{3}+\frac{1}{2}\)

\(\Rightarrow\frac{2}{3}\div x=\frac{5}{6}\)

\(\Rightarrow x=\frac{2}{3}\div\frac{5}{6}\)

\(\Rightarrow x=\frac{4}{5}\)

Vậy \(x=\frac{4}{5}\)

b)

\(\frac{3}{4}.x+\frac{2}{5}=\frac{5}{2}\)

\(\Rightarrow\frac{3}{4}.x=\frac{5}{2}-\frac{2}{5}\)

\(\Rightarrow\frac{3}{4}.x=\frac{21}{10}\)

\(\Rightarrow x=\frac{21}{10}\div\frac{3}{4}\)

\(\Rightarrow x=\frac{14}{5}\)

Vậy \(x=\frac{14}{5}\)

Các bước chi tiết mình không trình bày ra nha.

Answer 2

a) 2/3:x-1/2=1/3

2/3:x=1/3+1/2

2/3:x=5/6

x=2/3:5/6

x=4/5

b) 3/4.x+2/5=5/2

3/4.x=5/2-2/5

3/4.x=21/10

x=21/10:3/4

x=14/5