Question

Tìm x 

\(\left(X-2\right)^2=\left(X-2\right)^4\)

\(770\div\left[\left(20X+10\right)\div X\right]=35\)

Answer 1

\(\left(x-2\right)^2=\left(x-4\right)^2\)

\(\left(x-2\right)^2=0\)

\(x-2=0\)

\(x=2\)

Answer 2

\(770\div\left[\left(20x+10\right)\div x\right]=35\)

\(\frac{20x+10}{x}=22\Rightarrow20x+10=22x\Rightarrow2x=10\Rightarrow x=5\)