Answer:
a = -3
Explanation:
-40+10a = -70
Add 40 to each side
-40+40+10a = -70+40
10a = -30
Divide each side by 10
10a/10 = -30/10
-40 + 10a = -70
Add 40 to both sides:
Divide both sides by 10:
A = -3
6.2m questions
8.2m answers