(4x+21)=85

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Solution for (4x+21)=85 equation: 



(4x+21)=85

We move all terms to the left:

(4x+21)-(85)=0

We get rid of parentheses

4x+21-85=0

We add all the numbers together, and all the variables

4x-64=0

We move all terms containing x to the left, all other terms to the right

4x=64

x=64/4

x=16

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