30y-10y+20y+500=120-20

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Solution for 30y-10y+20y+500=120-20 equation: 



30y-10y+20y+500=120-20

We move all terms to the left:

30y-10y+20y+500-(120-20)=0

We add all the numbers together, and all the variables

30y-10y+20y+500-100=0

We add all the numbers together, and all the variables

40y+400=0

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

40y=-400

y=-400/40

y=-10

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