Question

1/3 +2/3 : x = -7

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

(2x-3)(6-2x)=0

 

 

Answer 1

a)Ta có: \(\frac{1}{3}+\frac{2}{3}:x=-7\)

\(\Rightarrow\frac{2}{3}:x=\left(-7\right)-\frac{1}{3}=\frac{-22}{3}\)

 \(\Rightarrow x=\frac{2}{3}:\frac{-22}{3}=\frac{-1}{11}\)

c) Ta có:(2x-3).(6-2x) = 0

\(\Rightarrow\orbr{\begin{cases}2x-3=0\\6-2x=0\end{cases}\Rightarrow\orbr{\begin{cases}2x=3\\2x=6\end{cases}\Rightarrow}\orbr{\begin{cases}x=\frac{3}{2}\\x=3\end{cases}}}\) 

Vậy x = 2 hoặc x = \(\frac{3}{2}\)