Question

tìm x biết:

2/5 - x + 2x = 3/-4 

Answer 1

=>x+2x=23/20

=>x+2x=(1+2)x=23/20

3x=23/20

x=23/20:3

x=23/60

Answer 2

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

\(x+2x=\frac{2}{5}+\frac{3}{4}=\frac{23}{20}\)

\(1x+2x=x\left(1+2\right)=3x=\frac{23}{20}\)

\(x=\frac{23}{20}:3=\frac{23}{60}\)

Answer 3

x = 23/60

ủng hộ nhé