X-7=-w

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Solution for X-7=-w equation: 



X-7=-X

We move all terms to the left:

X-7-(-X)=0

We add all the numbers together, and all the variables

X-(-1X)-7=0

We get rid of parentheses

X+1X-7=0

We add all the numbers together, and all the variables

2X-7=0

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

2X=7

X=7/2

X=3+1/2

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