2y-4y=9

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Solution for 2y-4y=9 equation: 



2y-4y=9

We move all terms to the left:

2y-4y-(9)=0

We add all the numbers together, and all the variables

-2y-9=0

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

-2y=9

y=9/-2

y=-4+1/2

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