30+2y+5y=100

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Solution for 30+2y+5y=100 equation: 



30+2y+5y=100

We move all terms to the left:

30+2y+5y-(100)=0

We add all the numbers together, and all the variables

7y-70=0

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

7y=70

y=70/7

y=10

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