5w-21=7(w-1)

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Solution for 5w-21=7(w-1) equation: 



5w-21=7(w-1)

We move all terms to the left:

5w-21-(7(w-1))=0



We calculate terms in parentheses: -(7(w-1)), so:

7(w-1)

We multiply parentheses

7w-7

Back to the equation:

-(7w-7)



We get rid of parentheses

5w-7w+7-21=0

We add all the numbers together, and all the variables

-2w-14=0

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

-2w=14

w=14/-2

w=-7

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