-7y-21+3y=4(7-6y)

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Solution for -7y-21+3y=4(7-6y) equation: 



-7y-21+3y=4(7-6y)

We move all terms to the left:

-7y-21+3y-(4(7-6y))=0

We add all the numbers together, and all the variables

-7y+3y-(4(-6y+7))-21=0

We add all the numbers together, and all the variables

-4y-(4(-6y+7))-21=0



We calculate terms in parentheses: -(4(-6y+7)), so:

4(-6y+7)

We multiply parentheses

-24y+28

Back to the equation:

-(-24y+28)



We get rid of parentheses

-4y+24y-28-21=0

We add all the numbers together, and all the variables

20y-49=0

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

20y=49

y=49/20

y=2+9/20

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