X+20+2x-56=90

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Solution for X+20+2x-56=90 equation: 



X+20+2X-56=90

We move all terms to the left:

X+20+2X-56-(90)=0

We add all the numbers together, and all the variables

3X-126=0

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

3X=126

X=126/3

X=42

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