Question

Tìm x, biết :

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

Answer 1

3x(12x-4) - 9x(4x-3) = 30

<=> 36x² - 12x - 36x² + 27x = 30

<=> 15x = 30

<=> x = 2

Answer 2

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

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

\(\Leftrightarrow15x=30\)

\(\Rightarrow x=2\)

Answer 3

 3x(12x-4)-9x(4x-3)= 30

<=>36x^2 -12x -36x^2 +27x= 30

<=>15x = 30

=>x= 2