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2-5(5r+7)=3-7r
We simplify the equation to the form, which is simple to understand
2-5(5r+7)=3-7r
Reorder the terms in parentheses
2+(-25r-35)=3-7r
Remove unnecessary parentheses
+2-25r-35=+3-7r
We move all terms containing r to the left and all other terms to the right.
-25r+7r=+3-2+35
We simplify left and right side of the equation.
-18r=+36
We divide both sides of the equation by -18 to get r.
r=-2
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