Question

a, 2x(x-2/3) =0

b,37-x phan x+13 = 3 phan 7

tim x 

trinh bay ra nha

Answer 1

\(2x\left(x-\frac{2}{3}\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}2x=0\\x-\frac{2}{3}=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=0\\x=\frac{2}{3}\end{cases}}}\)

Vậy x = 2 hoặc x = 2/3

\(\frac{37-x}{x+13}=\frac{3}{7}\)

\(\Rightarrow\left(37-x\right)\times7=\left(x+13\right)\times3\)

\(\Rightarrow259-7x=3x+39\)

\(-7x-3x=39-259\)

\(-10x=-220\)

\(x=22\)