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6x-18+2x=3x+102
We move all terms to the left:
6x-18+2x-(3x+102)=0
We add all the numbers together, and all the variables
8x-(3x+102)-18=0
We get rid of parentheses
8x-3x-102-18=0
We add all the numbers together, and all the variables
5x-120=0
We move all terms containing x to the left, all other terms to the right
5x=120
x=120/5
x=24
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