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72x+12x=1212+92x
We move all terms to the left:
72x+12x-(1212+92x)=0
We add all the numbers together, and all the variables
72x+12x-(92x+1212)=0
We add all the numbers together, and all the variables
84x-(92x+1212)=0
We get rid of parentheses
84x-92x-1212=0
We add all the numbers together, and all the variables
-8x-1212=0
We move all terms containing x to the left, all other terms to the right
-8x=1212
x=1212/-8
x=-151+1/2
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