Answer:
may I help u....................
....... m
Step-by-step explanation:
For no. 3
x - 3 = 3 - x
x + x = 3 + 3
2x = 6
x = 6 / 2
x = 3
For no. 4
3(x + 4) = 3x + 4
3x + 12 = 3x + 4
3x - 3x = 4 - 12
0 = - 8
