3+-4y=-9

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Solution for 3+-4y=-9 equation: 



3+-4y=-9

We move all terms to the left:

3+-4y-(-9)=0

We add all the numbers together, and all the variables

-4y+12=0

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

-4y=-12

y=-12/-4

y=+3

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