21-y/4=12

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Solution for 21-y/4=12 equation: 



21-y/4=12

We move all terms to the left:

21-y/4-(12)=0

We add all the numbers together, and all the variables

-y/4+9=0

We multiply all the terms by the denominator


-y+9*4=0

We add all the numbers together, and all the variables

-1y+36=0

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

-y=-36

y=-36/-1

y=+36

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