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(x+8)+2x=40
We move all terms to the left:
(x+8)+2x-(40)=0
We add all the numbers together, and all the variables
2x+(x+8)-40=0
We get rid of parentheses
2x+x+8-40=0
We add all the numbers together, and all the variables
3x-32=0
We move all terms containing x to the left, all other terms to the right
3x=32
x=32/3
x=10+2/3
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