X+(3x+4)=90

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Solution for X+(3x+4)=90 equation: 



X+(3X+4)=90

We move all terms to the left:

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

We get rid of parentheses

X+3X+4-90=0

We add all the numbers together, and all the variables

4X-86=0

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

4X=86

X=86/4

X=21+1/2

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