Question

Tìm x:

a) x : 3/4+1/4=-2/3

b) 1/3x + 2/5(x+1)=0

 

Answer 1

a,

\(x:\frac{3}{4}+\frac{1}{4}=-\frac{2}{3}\)

\(x:\frac{3}{4}=-\frac{2}{3}-\frac{1}{4}=-\frac{11}{12}\)

\(x=-\frac{11}{12}.\frac{3}{4}=-\frac{11}{16}\)

Answer 2

a)\(x:\frac{3}{4}+\frac{1}{4}=-\frac{2}{3}\)

\(x:\frac{3}{4}=-\frac{2}{3}-\frac{1}{4}\)

\(x:\frac{3}{4}=-\frac{11}{12}\)

\(x=-\frac{11}{16}\)

Answer 3

b)\(\frac{1}{3}x+\frac{2}{5}\left(x+1\right)=0\)

\(\frac{1}{3}x+\frac{2}{5}x+\frac{2}{5}=0\)

\(\left(\frac{1}{3}+\frac{2}{5}\right)x+\frac{2}{5}=0\)

\(\frac{11}{15}x=-\frac{2}{5}\)

\(x=-\frac{6}{11}\)