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3b+7-3+8b=2(b+5)+7(2b-3)
We simplify the equation to the form, which is simple to understand
3b+7-3+8b=2(b+5)+7(2b-3)
Reorder the terms in parentheses
3b+7-3+8b=+(+2b+10)+7*(2b-3)
Remove unnecessary parentheses
+3b+7-3+8b=+2b+10+7+*(+2b-3+)
Reorder the terms in parentheses
3b+7-3+8b=+2b+10+(+14b-21)
Remove unnecessary parentheses
+3b+7-3+8b=+2b+10+14b-21
We move all terms containing b to the left and all other terms to the right.
+3b+8b-2b-14b=+10-21-7+3
We simplify left and right side of the equation.
-5b=-15
We divide both sides of the equation by -5 to get b.
b=3
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