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-6+3(7-b)=13
We simplify the equation to the form, which is simple to understand
-6+3(7-b)=13
Reorder the terms in parentheses
-6+(+21-3b)=13
Remove unnecessary parentheses
-6+21-3b=+13
We move all terms containing b to the left and all other terms to the right.
-3b=+13+6-21
We simplify left and right side of the equation.
-3b=-2
We divide both sides of the equation by -3 to get b.
b=0.666666666667
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