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13+2x=7-6.x
We move all terms to the left:
13+2x-(7-6.x)=0
We add all the numbers together, and all the variables
2x-(-6x+7)+13=0
We get rid of parentheses
2x+6x-7+13=0
We add all the numbers together, and all the variables
8x+6=0
We move all terms containing x to the left, all other terms to the right
8x=-6
x=-6/8
x=-3/4
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