How do you solve the question to this problem what is the answer to this problem how do you work this problem out

You can do it like this. Subtract the right side. Expand parentheses. Collect terms. Divide by the coefficient of x. Add the opposite of the constant term.

3(2x -3) -9x -4 -(2x +12) = 0 . . . . . . subtract the right side
6x -9 -9x -4 -2x -12 = 0 . . . . . . . . . .eliminate parentheses
x(6 -9 -2) -(9 +4 +12) = 0 . . . . . . . . . collect terms
-5x -25 = 0 . . . . . . . . . . . . . . . . . . . . finish collecting terms
x +5 = 0 . . . . . . . . . . . . . . . . . . . . . . . divide by the coefficient of x
x = -5 . . . . . . . . . . . . . . . . . . . . . . . . . add the opposite of the constant

These general instructions will work for any single-variable linear equation.