x+x+7+x+11=90

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Solution for x+x+7+x+11=90 equation: 



x+x+7+x+11=90

We move all terms to the left:

x+x+7+x+11-(90)=0

We add all the numbers together, and all the variables

3x-72=0

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

3x=72

x=72/3

x=24

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