15-x-x=1

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Solution for 15-x-x=1 equation: 



15-x-x=1

We move all terms to the left:

15-x-x-(1)=0

We add all the numbers together, and all the variables

-2x+14=0

We move all terms containing x to the left, all other terms to the right

-2x=-14

x=-14/-2

x=+7

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