Answer:
2x + 3 = -7 ---> x = -5
4.5x - 7 = 20 ---> x = 6
-3x + 7 = 28 ---> x = -7
Step-by-step explanation:
2x + 3 = -7
2x = -10
x = -5
4.5x - 7 = 20
4.5x = 27
x = 6
-3x + 7 = 28
-3x = 21
x = -7
