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12+2x-5=7x-1
We move all terms to the left:
12+2x-5-(7x-1)=0
We add all the numbers together, and all the variables
2x-(7x-1)+7=0
We get rid of parentheses
2x-7x+1+7=0
We add all the numbers together, and all the variables
-5x+8=0
We move all terms containing x to the left, all other terms to the right
-5x=-8
x=-8/-5
x=1+3/5
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