20=278-w

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Solution for 20=278-w equation: 



20=278-w

We move all terms to the left:

20-(278-w)=0

We add all the numbers together, and all the variables

-(-1w+278)+20=0

We get rid of parentheses

1w-278+20=0

We add all the numbers together, and all the variables

w-258=0

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

w=258

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