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4r-8+7=-3(r+5)
We simplify the equation to the form, which is simple to understand
4r-8+7=-3(r+5)
Reorder the terms in parentheses
4r-8+7=+(-3r-15)
Remove unnecessary parentheses
+4r-8+7=-3r-15
We move all terms containing r to the left and all other terms to the right.
+4r+3r=-15+8-7
We simplify left and right side of the equation.
+7r=-14
We divide both sides of the equation by 7 to get r.
r=-2
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