12y+12+15y-21=180

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Solution for 12y+12+15y-21=180 equation: 



12y+12+15y-21=180

We move all terms to the left:

12y+12+15y-21-(180)=0

We add all the numbers together, and all the variables

27y-189=0

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

27y=189

y=189/27

y=7

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