Question

[Lương Bảo Yến]

Tìm x 

a. -2/3:(0,5-3x)=5/3

b. 1/7 |x| -4/5=1/5

Answer 1

[FL.Han_]

\(a,\frac{-2}{3}\div\left(\frac{1}{2}-3x\right)=\frac{5}{3}\)

\(\frac{1}{2}-3x=\frac{-2}{3}\div\frac{5}{3}\)

\(\frac{1}{2}-3x=\frac{-2}{5}\)

\(3x=\frac{1}{2}-\frac{-2}{5}\)

\(3x=\frac{9}{10}\)

\(x=\frac{9}{10}\div3=\frac{3}{10}\)

\(b,\frac{1}{7}\left|x\right|-\frac{4}{5}=\frac{1}{5}\)

\(\frac{1}{7}\left|x\right|=\frac{1}{5}+\frac{4}{5}=1\)

\(\left|x\right|=1\div\frac{1}{7}=7\)

\(\Leftrightarrow x=\pm7\)

Answer 2

[ミ★ngũッhoàngッluffy★彡]

-2/3:(1/2-3x)=5/3

(1/2-3x)=5/3.-3/2

(1/2-3x)=-5/2

3x=-5/2+1/2

3x=-3/2

x=-3/2:3/1

x=-3/2.1/3

x=-1/2