3y-4y=7

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Solution for 3y-4y=7 equation: 



3y-4y=7

We move all terms to the left:

3y-4y-(7)=0

We add all the numbers together, and all the variables

-1y-7=0

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

-y=7

y=7/-1

y=-7

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