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-5(2b+7)-7(-b-8)=0
We simplify the equation to the form, which is simple to understand
-5(2b+7)-7(-b-8)=0
Reorder the terms in parentheses
+(-10b-35)-7*(-b-8)=0
Remove unnecessary parentheses
-10b-35-7+*(-b-8+)=0
Reorder the terms in parentheses
-10b-35+(+7b+56)=0
Remove unnecessary parentheses
-10b-35+7b+56=0
We move all terms containing b to the left and all other terms to the right.
-10b+7b=0+35-56
We simplify left and right side of the equation.
-3b=-21
We divide both sides of the equation by -3 to get b.
b=7
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