-3y=300+7y

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Solution for -3y=300+7y equation: 



-3y=300+7y

We move all terms to the left:

-3y-(300+7y)=0

We add all the numbers together, and all the variables

-3y-(7y+300)=0

We get rid of parentheses

-3y-7y-300=0

We add all the numbers together, and all the variables

-10y-300=0

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

-10y=300

y=300/-10

y=-30

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