6-3(3-4b)=21

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Solution for 6-3(3-4b)=21 equation:


6-3(3-4b)=21

We simplify the equation to the form, which is simple to understand 
6-3(3-4b)=21

Reorder the terms in parentheses
6+(-9+12b)=21

Remove unnecessary parentheses
+6-9+12b=+21

We move all terms containing b to the left and all other terms to the right. 
+12b=+21-6+9

We simplify left and right side of the equation. 
+12b=+24

We divide both sides of the equation by 12 to get b. 
b=2

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