9y+21=15

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Solution for 9y+21=15 equation: 


Simplifying
9y + 21 = 15

Reorder the terms:
21 + 9y = 15

Solving
21 + 9y = 15

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 = 15 + -21

Combine like terms: 21 + -21 = 0
0 + 9y = 15 + -21
9y = 15 + -21

Combine like terms: 15 + -21 = -6
9y = -6

Divide each side by '9'.
y = -0.6666666667

Simplifying
y = -0.6666666667

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