-8+9w=7

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Solution for -8+9w=7 equation: 



-8+9w=7

We move all terms to the left:

-8+9w-(7)=0

We add all the numbers together, and all the variables

9w-15=0

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

9w=15

w=15/9

w=1+2/3

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