21y=(4y-6)

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



21y=(4y-6)

We move all terms to the left:

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



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

(4y-6)

We get rid of parentheses

4y-6

Back to the equation:

-(4y-6)



We get rid of parentheses

21y-4y+6=0

We add all the numbers together, and all the variables

17y+6=0

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

17y=-6

y=-6/17

y=-6/17

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