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b=-4; -8+7b-5 b
We simplify the equation to the form, which is simple to understand
b=-4;-8+7b-5b
We move all terms containing b to the left and all other terms to the right.
+1b-7b+5b=-4
We simplify left and right side of the equation.
-1b=-4
We divide both sides of the equation by -1 to get b.
b=4
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