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-58=-(1+5r)-2(-7r-3)
We simplify the equation to the form, which is simple to understand
-58=-(1+5r)-2(-7r-3)
Remove unnecessary parentheses
-58=-1-5r-2*(-7r-3)
Reorder the terms in parentheses
-58=-1-5r+(+14r+6)
Remove unnecessary parentheses
-58=-1-5r+14r+6
We move all terms containing r to the left and all other terms to the right.
+5r-14r=-1+6+58
We simplify left and right side of the equation.
-9r=+63
We divide both sides of the equation by -9 to get r.
r=-7
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