-9y+21=6y-9

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Solution for -9y+21=6y-9 equation:


Simplifying
-9y + 21 = 6y + -9

Reorder the terms:
21 + -9y = 6y + -9

Reorder the terms:
21 + -9y = -9 + 6y

Solving
21 + -9y = -9 + 6y

Solving for variable 'y'.

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

Add '-6y' to each side of the equation.
21 + -9y + -6y = -9 + 6y + -6y

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

Combine like terms: 6y + -6y = 0
21 + -15y = -9 + 0
21 + -15y = -9

Add '-21' to each side of the equation.
21 + -21 + -15y = -9 + -21

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

Combine like terms: -9 + -21 = -30
-15y = -30

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

Simplifying
y = 2

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