Question

4xX+3xX+2xX+x=100

Answer 1

4X + 3X + 2X + 1X = 100

\(\Rightarrow10x=100\\x=10\)

Answer 2

\(4x+3x+2x+x=100\)

\(\Leftrightarrow10x=100\Leftrightarrow x=\frac{100}{10}=10\)

Vậy \(x=10\)