20=(420-2w)/2

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Solution for 20=(420-2w)/2 equation: 



20=(420-2w)/2

We move all terms to the left:

20-((420-2w)/2)=0

We add all the numbers together, and all the variables

-((-2w+420)/2)+20=0

We multiply all the terms by the denominator


-((-2w+420)+20*2)=0



We calculate terms in parentheses: -((-2w+420)+20*2), so:

(-2w+420)+20*2

We add all the numbers together, and all the variables

(-2w+420)+40

We get rid of parentheses

-2w+420+40

We add all the numbers together, and all the variables

-2w+460

Back to the equation:

-(-2w+460)



We get rid of parentheses

2w-460=0

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

2w=460

w=460/2

w=230

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