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(x+8)+x+88=300
We move all terms to the left:
(x+8)+x+88-(300)=0
We add all the numbers together, and all the variables
x+(x+8)-212=0
We get rid of parentheses
x+x+8-212=0
We add all the numbers together, and all the variables
2x-204=0
We move all terms containing x to the left, all other terms to the right
2x=204
x=204/2
x=102
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