x=90-42x

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Solution for x=90-42x equation: 



x=90-42x

We move all terms to the left:

x-(90-42x)=0

We add all the numbers together, and all the variables

x-(-42x+90)=0

We get rid of parentheses

x+42x-90=0

We add all the numbers together, and all the variables

43x-90=0

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

43x=90

x=90/43

x=2+4/43

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