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4b+3=3b+12
We simplify the equation to the form, which is simple to understand
4b+3=3b+12
We move all terms containing b to the left and all other terms to the right.
+4b-3b=+12-3
We simplify left and right side of the equation.
+1b=+9
We divide both sides of the equation by 1 to get b.
b=9
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