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-217-x=103+15x
We move all terms to the left:
-217-x-(103+15x)=0
We add all the numbers together, and all the variables
-x-(15x+103)-217=0
We add all the numbers together, and all the variables
-1x-(15x+103)-217=0
We get rid of parentheses
-1x-15x-103-217=0
We add all the numbers together, and all the variables
-16x-320=0
We move all terms containing x to the left, all other terms to the right
-16x=320
x=320/-16
x=-20
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