21-6y=9

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Solution for 21-6y=9 equation: 


Simplifying
21 + -6y = 9

Solving
21 + -6y = 9

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 + -6y = 9 + -21

Combine like terms: 21 + -21 = 0
0 + -6y = 9 + -21
-6y = 9 + -21

Combine like terms: 9 + -21 = -12
-6y = -12

Divide each side by '-6'.
y = 2

Simplifying
y = 2

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