421.85=200+.87x

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Solution for 421.85=200+.87x equation: 



421.85=200+.87x

We move all terms to the left:

421.85-(200+.87x)=0

We add all the numbers together, and all the variables

-(.87x+200)+421.85=0

We get rid of parentheses

-.87x-200+421.85=0

We add all the numbers together, and all the variables

-0.87x+221.85=0

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

-0.87x=-221.85

x=-221.85/-0.87

x=+255

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