10y-9=21

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Solution for 10y-9=21 equation:



10y-9=21
We move all terms to the left:
10y-9-(21)=0
We add all the numbers together, and all the variables
10y-30=0
We move all terms containing y to the left, all other terms to the right
10y=30
y=30/10
y=3

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