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40-7b=-8(-5+8b)
We simplify the equation to the form, which is simple to understand
40-7b=-8(-5+8b)
Reorder the terms in parentheses
40-7b=+(+40-64b)
Remove unnecessary parentheses
+40-7b=+40-64b
We move all terms containing b to the left and all other terms to the right.
-7b+64b=+40-40
We simplify left and right side of the equation.
+57b=0
We divide both sides of the equation by 57 to get b.
b=0
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