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8-9x-3x=-39+5x-12
We move all terms to the left:
8-9x-3x-(-39+5x-12)=0
We add all the numbers together, and all the variables
-9x-3x-(5x-51)+8=0
We add all the numbers together, and all the variables
-12x-(5x-51)+8=0
We get rid of parentheses
-12x-5x+51+8=0
We add all the numbers together, and all the variables
-17x+59=0
We move all terms containing x to the left, all other terms to the right
-17x=-59
x=-59/-17
x=3+8/17
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