9+3y=4.2-0.2y

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Solution for 9+3y=4.2-0.2y equation: 



9+3y=4.2-0.2y

We move all terms to the left:

9+3y-(4.2-0.2y)=0

We add all the numbers together, and all the variables

3y-(-0.2y+4.2)+9=0

We get rid of parentheses

3y+0.2y-4.2+9=0

We add all the numbers together, and all the variables

3.2y+4.8=0

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

3.2y=-4.8

y=-4.8/3.2

y=-1+1/2

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