18+-7w=-45

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Solution for 18+-7w=-45 equation: 



18+-7w=-45

We move all terms to the left:

18+-7w-(-45)=0

We add all the numbers together, and all the variables

-7w+63=0

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

-7w=-63

w=-63/-7

w=+9

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