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2x+5x-4=12x-8+4
We move all terms to the left:
2x+5x-4-(12x-8+4)=0
We add all the numbers together, and all the variables
2x+5x-(12x-4)-4=0
We add all the numbers together, and all the variables
7x-(12x-4)-4=0
We get rid of parentheses
7x-12x+4-4=0
We add all the numbers together, and all the variables
-5x=0
x=0/-5
x=0
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