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15x-5-12x+6+13x=7x+15
We move all terms to the left:
15x-5-12x+6+13x-(7x+15)=0
We add all the numbers together, and all the variables
16x-(7x+15)+1=0
We get rid of parentheses
16x-7x-15+1=0
We add all the numbers together, and all the variables
9x-14=0
We move all terms containing x to the left, all other terms to the right
9x=14
x=14/9
x=1+5/9
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