7w+3w=90

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Solution for 7w+3w=90 equation: 



7w+3w=90

We move all terms to the left:

7w+3w-(90)=0

We add all the numbers together, and all the variables

10w-90=0

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

10w=90

w=90/10

w=9

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