Answer:
5(7-x)=-5(-5+12) x=14
Step-by-step explanation:
You distribute the 5 on the left to everything in the parenthesis on the left. On the right you distribute the -5 to everything in the parenthesis on the right. Then you have to isolate the x, and you should end up with x= 14. When you check your answer by plugging in 14 for x, it works.