21-6y=27-8y

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Solution for 21-6y=27-8y equation:


Simplifying
21 + -6y = 27 + -8y

Solving
21 + -6y = 27 + -8y

Solving for variable 'y'.

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

Add '8y' to each side of the equation.
21 + -6y + 8y = 27 + -8y + 8y

Combine like terms: -6y + 8y = 2y
21 + 2y = 27 + -8y + 8y

Combine like terms: -8y + 8y = 0
21 + 2y = 27 + 0
21 + 2y = 27

Add '-21' to each side of the equation.
21 + -21 + 2y = 27 + -21

Combine like terms: 21 + -21 = 0
0 + 2y = 27 + -21
2y = 27 + -21

Combine like terms: 27 + -21 = 6
2y = 6

Divide each side by '2'.
y = 3

Simplifying
y = 3

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