4=90-3x

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Solution for 4=90-3x equation: 



4=90-3x

We move all terms to the left:

4-(90-3x)=0

We add all the numbers together, and all the variables

-(-3x+90)+4=0

We get rid of parentheses

3x-90+4=0

We add all the numbers together, and all the variables

3x-86=0

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

3x=86

x=86/3

x=28+2/3

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