-4
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5+r=-9
-5 -5
_______
r=-14
Steps:
Subtract 5 from each side. Whatever you do to one side, you must do to the other.
That's it...this is a simple equation.
r+5r+5=-25
-8
15 and 24, respectively.
3+10-r+6r = -3+9r+0 13+5r = -3+9r 16 = 4r r = 4
12r + 4 = 112, 12r = 108, r = 9