Question

 3x(12x – 4) – 9x(4x – 3) = 30

Tìm x

Answer 1

<=> \(36x^2-12x-36x^2+27x-30=0\)

<=> \(15x-30=0\)

=> 15x = 30

=> x = 2

Answer 2

\(\Leftrightarrow36x^2-12x-36x^2+27x=30\\ \Leftrightarrow15x=30\\ \Leftrightarrow x=2\)