21-2y=24

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Solution for 21-2y=24 equation: 


Simplifying
21 + -2y = 24

Solving
21 + -2y = 24

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 + -2y = 24 + -21

Combine like terms: 21 + -21 = 0
0 + -2y = 24 + -21
-2y = 24 + -21

Combine like terms: 24 + -21 = 3
-2y = 3

Divide each side by '-2'.
y = -1.5

Simplifying
y = -1.5

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