4w+21=7w+30

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Solution for 4w+21=7w+30 equation: 



4w+21=7w+30

We move all terms to the left:

4w+21-(7w+30)=0

We get rid of parentheses

4w-7w-30+21=0

We add all the numbers together, and all the variables

-3w-9=0

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

-3w=9

w=9/-3

w=-3

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