3y+42=135

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Solution for 3y+42=135 equation: 



3y+42=135

We move all terms to the left:

3y+42-(135)=0

We add all the numbers together, and all the variables

3y-93=0

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

3y=93

y=93/3

y=31

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