21X+6=2y+90

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Solution for 21X+6=2y+90 equation: 



21X+6=2X+90

We move all terms to the left:

21X+6-(2X+90)=0

We get rid of parentheses

21X-2X-90+6=0

We add all the numbers together, and all the variables

19X-84=0

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

19X=84

X=84/19

X=4+8/19

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