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(30+-1y)+y=30
We move all terms to the left:
(30+-1y)+y-(30)=0
We add all the numbers together, and all the variables
(-1y)+y-30=0
We add all the numbers together, and all the variables
y+(-1y)-30=0
We get rid of parentheses
y-1y-30=0
We add all the numbers together, and all the variables
-30!=0
There is no solution for this equation
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