Question

Tìm x biết:

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

Answer 1

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

Answer 2

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

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

\(=>15x=30\)

\(x=30:15=2\)

Vậy x = 2.

~ Hok tốt ~

Answer 3

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

<=>36x²-12x-36x²+27x=30

<=>15x=30

=>x=30:15

=>x=2