-3(x-14) + 9x = 6x + 42
Subtract 6x to the other side of the equation, along with subtracting 42
-3(x - 14) + 9x - 6x - 42
Deal with the -3(x-14)
-3x + 42 + 9x - 6x - 42
Combine like terms
-3x + 9x - 6x = 0
42 - 42 = 0
0 = 0
Your answer is Infinitely Many Solutions