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b-8+4b=30
We simplify the equation to the form, which is simple to understand
b-8+4b=30
We move all terms containing b to the left and all other terms to the right.
+1b+4b=+30+8
We simplify left and right side of the equation.
+5b=+38
We divide both sides of the equation by 5 to get b.
b=7.6
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