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3X+13X=-2X+1
We move all terms to the left:
3X+13X-(-2X+1)=0
We add all the numbers together, and all the variables
16X-(-2X+1)=0
We get rid of parentheses
16X+2X-1=0
We add all the numbers together, and all the variables
18X-1=0
We move all terms containing X to the left, all other terms to the right
18X=1
X=1/18
X=1/18
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