3=(-3y)-15

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Solution for 3=(-3y)-15 equation: 



3=(-3y)-15

We move all terms to the left:

3-((-3y)-15)=0



We calculate terms in parentheses: -((-3y)-15), so:

(-3y)-15

We get rid of parentheses

-3y-15

Back to the equation:

-(-3y-15)



We get rid of parentheses

3y+15+3=0

We add all the numbers together, and all the variables

3y+18=0

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

3y=-18

y=-18/3

y=-6

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