21-3y=36-6y

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Solution for 21-3y=36-6y equation:


Simplifying
21 + -3y = 36 + -6y

Solving
21 + -3y = 36 + -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 + -3y + 6y = 36 + -6y + 6y

Combine like terms: -3y + 6y = 3y
21 + 3y = 36 + -6y + 6y

Combine like terms: -6y + 6y = 0
21 + 3y = 36 + 0
21 + 3y = 36

Add '-21' to each side of the equation.
21 + -21 + 3y = 36 + -21

Combine like terms: 21 + -21 = 0
0 + 3y = 36 + -21
3y = 36 + -21

Combine like terms: 36 + -21 = 15
3y = 15

Divide each side by '3'.
y = 5

Simplifying
y = 5

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