Answer: x = -6
Step-by-step explanation:
Whenever you want to find the x-intercept (this would also apply to y-intercept, but we're focusing on x), you'd simply equal y to 0 and then solve for x.
-2x + 3(0) = 12
-2x = 12
÷-2 ÷-2
The answer is going to be x = -6