Answer:
x =-4
Step-by-step explanation:
[tex]12 - 3x = -6x[/tex]
Step 1 ; Collect like terms . (put the numbers with variables on one side of the equation and ordinary numbers on the other side )
[tex]12 =-6x+3x[/tex]
Note ; When a number is crossing over an equality sign ; the sign will always change
Step 2 ;
Simplify
[tex]-6x +3x =-3x\\\\ 12=-3x[/tex]
Step 3 ; Divide both sides of the equation by -3
[tex]\frac{12}{-3} = \frac{-3x}{-3} \\\\-4 = x[/tex]
Switch sides
[tex]x =-4[/tex]
