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12x+-3*5x-12=3x+13
We move all terms to the left:
12x+-3*5x-12-(3x+13)=0
We add all the numbers together, and all the variables
12x-3*5x-(3x+13)=0
Wy multiply elements
12x-15x-(3x+13)=0
We get rid of parentheses
12x-15x-3x-13=0
We add all the numbers together, and all the variables
-6x-13=0
We move all terms containing x to the left, all other terms to the right
-6x=13
x=13/-6
x=-2+1/6
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