10.5+-0.5y+y=21

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Solution for 10.5+-0.5y+y=21 equation: 



10.5+-0.5y+y=21

We move all terms to the left:

10.5+-0.5y+y-(21)=0

determiningTheFunctionDomain
-0.5y+y+10.5-21+=0

We add all the numbers together, and all the variables

0.5y=0

y=0/0.5

y=0

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