0.1y+0.2(15-y)=21

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Solution for 0.1y+0.2(15-y)=21 equation: 



0.1y+0.2(15-y)=21

We move all terms to the left:

0.1y+0.2(15-y)-(21)=0

We add all the numbers together, and all the variables

0.1y+0.2(-1y+15)-21=0

We multiply parentheses

0.1y-0.2y+3-21=0

We add all the numbers together, and all the variables

-0.1y-18=0

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

-0.1y=18

y=18/-0.1

y=-180

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