30y-9y-12y=3,42

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Solution for 30y-9y-12y=3,42 equation: 



30y-9y-12y=3.42

We move all terms to the left:

30y-9y-12y-(3.42)=0

We add all the numbers together, and all the variables

9y-3.42=0

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

9y=3.42

y=3.42/9

y=1/2.6315789473684

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