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12x+30-8x=15x+52
We move all terms to the left:
12x+30-8x-(15x+52)=0
We add all the numbers together, and all the variables
4x-(15x+52)+30=0
We get rid of parentheses
4x-15x-52+30=0
We add all the numbers together, and all the variables
-11x-22=0
We move all terms containing x to the left, all other terms to the right
-11x=22
x=22/-11
x=-2
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