21-9y=3

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Solution for 21-9y=3 equation: 


Simplifying
21 + -9y = 3

Solving
21 + -9y = 3

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + -21 + -9y = 3 + -21

Combine like terms: 21 + -21 = 0
0 + -9y = 3 + -21
-9y = 3 + -21

Combine like terms: 3 + -21 = -18
-9y = -18

Divide each side by '-9'.
y = 2

Simplifying
y = 2

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