21-3y=20

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Solution for 21-3y=20 equation:


21-3y=20

We simplify the equation to the form, which is simple to understand 
21-3y=20

We move all terms containing y to the left and all other terms to the right. 
-3y=+20-21

We simplify left and right side of the equation. 
-3y=-1

We divide both sides of the equation by -3 to get y. 
y=0.333333333333

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