Answer:
a = -7
Step-by-step explanation:
7a+3=4a-18
Subtract 4a from each side
7a-4a+3=4a-4a-18
3a +3 = -18
Subtract 3 from each side
3a +3-3 = -18-3
3a= -21
Divide each side by 3
3a/3 = -21/3
