.4y+5=1.2y-7

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Solution for .4y+5=1.2y-7 equation: 



.4y+5=1.2y-7

We move all terms to the left:

.4y+5-(1.2y-7)=0

We get rid of parentheses

.4y-1.2y+7+5=0

We add all the numbers together, and all the variables

-0.8y+12=0

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

-0.8y=-12

y=-12/-0.8

y=+15

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