15-4-7=x

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Solution for 15-4-7=x equation: 



15-4-7=x

We move all terms to the left:

15-4-7-(x)=0

We add all the numbers together, and all the variables

-1x+4=0

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

-x=-4

x=-4/-1

x=+4

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