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2+3x+2x-57=-15+4x
We move all terms to the left:
2+3x+2x-57-(-15+4x)=0
We add all the numbers together, and all the variables
3x+2x-(4x-15)+2-57=0
We add all the numbers together, and all the variables
5x-(4x-15)-55=0
We get rid of parentheses
5x-4x+15-55=0
We add all the numbers together, and all the variables
x-40=0
We move all terms containing x to the left, all other terms to the right
x=40
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