6y+21=5y+9

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Solution for 6y+21=5y+9 equation: 


Simplifying
6y + 21 = 5y + 9

Reorder the terms:
21 + 6y = 5y + 9

Reorder the terms:
21 + 6y = 9 + 5y

Solving
21 + 6y = 9 + 5y

Solving for variable 'y'.

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

Add '-5y' to each side of the equation.
21 + 6y + -5y = 9 + 5y + -5y

Combine like terms: 6y + -5y = 1y
21 + 1y = 9 + 5y + -5y

Combine like terms: 5y + -5y = 0
21 + 1y = 9 + 0
21 + 1y = 9

Add '-21' to each side of the equation.
21 + -21 + 1y = 9 + -21

Combine like terms: 21 + -21 = 0
0 + 1y = 9 + -21
1y = 9 + -21

Combine like terms: 9 + -21 = -12
1y = -12

Divide each side by '1'.
y = -12

Simplifying
y = -12

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