21-y+5;y=12

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Solution for 21-y+5;y=12 equation: 



21-y+5y=12

We move all terms to the left:

21-y+5y-(12)=0

We add all the numbers together, and all the variables

4y+9=0

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

4y=-9

y=-9/4

y=-2+1/4

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