Question

TÌm x, biết:

\(3x\left(12x-4\right)-9x\left(4x-3\right)=30\)

Answer 1

3x(12x - 4) - 9x(4x - 3) = 36x² - 12x - 36x² + 27x = 15x = 30 => x = 2

Answer 2

\(3x\left(12x-4\right)-9x\left(4x-3\right)=30\)

\(\Leftrightarrow36x^2-12x-36x^2+27x=30\)

\(\Leftrightarrow15x=30\)

\(\Leftrightarrow x=30:15\)

\(\Leftrightarrow x=2\)