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x+x+x+149=x+361
We move all terms to the left:
x+x+x+149-(x+361)=0
We add all the numbers together, and all the variables
3x-(x+361)+149=0
We get rid of parentheses
3x-x-361+149=0
We add all the numbers together, and all the variables
2x-212=0
We move all terms containing x to the left, all other terms to the right
2x=212
x=212/2
x=106
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