3y-4+0.2y=15+1.2y+21

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Solution for 3y-4+0.2y=15+1.2y+21 equation: 



3y-4+0.2y=15+1.2y+21

We move all terms to the left:

3y-4+0.2y-(15+1.2y+21)=0

We add all the numbers together, and all the variables

3y+0.2y-(1.2y+36)-4=0

We add all the numbers together, and all the variables

3.2y-(1.2y+36)-4=0

We get rid of parentheses

3.2y-1.2y-36-4=0

We add all the numbers together, and all the variables

2y-40=0

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

2y=40

y=40/2

y=20

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