21=(5-2w)3

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Solution for 21=(5-2w)3 equation: 



21=(5-2w)3

We move all terms to the left:

21-((5-2w)3)=0

We add all the numbers together, and all the variables

-((-2w+5)3)+21=0



We calculate terms in parentheses: -((-2w+5)3), so:

(-2w+5)3

We multiply parentheses

-6w+15

Back to the equation:

-(-6w+15)



We get rid of parentheses

6w-15+21=0

We add all the numbers together, and all the variables

6w+6=0

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

6w=-6

w=-6/6

w=-1

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