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kolbaska11 [484]
3 years ago
11

Solve for r: -5 = 7 + 3r

Mathematics
2 answers:
larisa86 [58]3 years ago
8 0
-5=7+3r\ \ \ \ \ \ |combine\ like\ terms\\\\-5-7=3r\\\\-12=3r\ \ \ \ \ \ \ |:3\\\\r=-4
Setler79 [48]3 years ago
6 0
So,

-5 = 7 + 3r
(subtract 7 from both sides)
-12 = 3r
(divide both sides by 3)
-4 = r
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