Answer:
x = 4.
Step-by-step explanation:
4 - 5x = 12 - 7x
4 - 5x + 7x = 12 - 7x + 7x
4 + 2x = 12
4 - 4 + 2x = 12 - 4
2x = 8
x = 8/2 = 4.
4-5x=12-7x
-5x+7x=12-4
2x=8
x=8/2
x=4
