8-2y=21-6y

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Solution for 8-2y=21-6y equation:


Simplifying
8 + -2y = 21 + -6y

Solving
8 + -2y = 21 + -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.
8 + -2y + 6y = 21 + -6y + 6y

Combine like terms: -2y + 6y = 4y
8 + 4y = 21 + -6y + 6y

Combine like terms: -6y + 6y = 0
8 + 4y = 21 + 0
8 + 4y = 21

Add '-8' to each side of the equation.
8 + -8 + 4y = 21 + -8

Combine like terms: 8 + -8 = 0
0 + 4y = 21 + -8
4y = 21 + -8

Combine like terms: 21 + -8 = 13
4y = 13

Divide each side by '4'.
y = 3.25

Simplifying
y = 3.25

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