Answer:
a=-2
Step-by-step explanation:
Combine common variables on both sides.
3a-7a-28=10a
-4a-28=10a
Add variables to other side
-28=14a
Divide each side by 14
a=-2
The answer for the distibutive oneis 7(4+6)
Answer: D. 40
Step-by-step explanation:
1/2x=20
1/2x × 2=20 × 2 ⇔ multiplication property of equality
x=40
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Answer:
36
Step-by-step explanation:
Replace the 2b with 10 and then do the parenthesis, so 10-4=6
now multiply it with the 6 outside the parenthesis and you get 36