Answer:
Junior is 11 and Grandpa is 59
Step-by-step explanation:
G = 6J - 7 Get G by itself
G + J = 70
- J -J
G = -J + 70 Set the two equations equal to each other
6J - 7 = -J + 70
+J +J Add J to both sides
7J - 7 = 70
+ 7 +7 Add 7 to both sides
7J = 77 Divide both sdies by 7
J = 11
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