Answer:
D. 21
Step-by-step explanation:
replace 21 for r, 4(21)=84
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Answer:
You do Thisbe
Step-by-step explanation:
Set measurements equal to each other.
7X + 20 = 8X + 8
-7X -7X
20 = X + 8
-8 -8
ANSWER: X=12
Answer:
10
Step-by-step explanation: