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x+(x+3)+x+(x+3)=38
We move all terms to the left:
x+(x+3)+x+(x+3)-(38)=0
We add all the numbers together, and all the variables
2x+(x+3)+(x+3)-38=0
We get rid of parentheses
2x+x+x+3+3-38=0
We add all the numbers together, and all the variables
4x-32=0
We move all terms containing x to the left, all other terms to the right
4x=32
x=32/4
x=8
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