10.5+3y=21

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Solution for 10.5+3y=21 equation: 



10.5+3y=21

We move all terms to the left:

10.5+3y-(21)=0

We add all the numbers together, and all the variables

3y-10.5=0

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

3y=10.5

y=10.5/3

y=3+1/2

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