21=y/4-19

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Solution for 21=y/4-19 equation: 



21=y/4-19

We move all terms to the left:

21-(y/4-19)=0

We get rid of parentheses

-y/4+19+21=0

We multiply all the terms by the denominator


-y+19*4+21*4=0

We add all the numbers together, and all the variables

-1y+160=0

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

-y=-160

y=-160/-1

y=+160

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