30=20-5y

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Solution for 30=20-5y equation: 



30=20-5y

We move all terms to the left:

30-(20-5y)=0

We add all the numbers together, and all the variables

-(-5y+20)+30=0

We get rid of parentheses

5y-20+30=0

We add all the numbers together, and all the variables

5y+10=0

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

5y=-10

y=-10/5

y=-2

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