4b=21+b

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Solution for 4b=21+b equation:


4b=21+b

We simplify the equation to the form, which is simple to understand 
4b=21+b

We move all terms containing b to the left and all other terms to the right. 
+4b-1b=+21

We simplify left and right side of the equation. 
+3b=+21

We divide both sides of the equation by 3 to get b. 
b=7

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