90=21x-56

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Solution for 90=21x-56 equation: 



90=21x-56

We move all terms to the left:

90-(21x-56)=0

We get rid of parentheses

-21x+56+90=0

We add all the numbers together, and all the variables

-21x+146=0

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

-21x=-146

x=-146/-21

x=6+20/21

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