42=54-2w

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Solution for 42=54-2w equation: 



42=54-2w

We move all terms to the left:

42-(54-2w)=0

We add all the numbers together, and all the variables

-(-2w+54)+42=0

We get rid of parentheses

2w-54+42=0

We add all the numbers together, and all the variables

2w-12=0

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

2w=12

w=12/2

w=6

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