2y+9=-21

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Solution for 2y+9=-21 equation: 


Simplifying
2y + 9 = -21

Reorder the terms:
9 + 2y = -21

Solving
9 + 2y = -21

Solving for variable 'y'.

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

Add '-9' to each side of the equation.
9 + -9 + 2y = -21 + -9

Combine like terms: 9 + -9 = 0
0 + 2y = -21 + -9
2y = -21 + -9

Combine like terms: -21 + -9 = -30
2y = -30

Divide each side by '2'.
y = -15

Simplifying
y = -15

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