2 years ago

Solve for r: -5 = 7 + 3r

Mathematics

2 answers:

larisa86 [58]2 years ago

8 0

$-5=7+3r\ \ \ \ \ \ |combine\ like\ terms\\\\-5-7=3r\\\\-12=3r\ \ \ \ \ \ \ |:3\\\\r=-4$

Setler79 [48]2 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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