21-3y=36-6

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


Simplifying
21 + -3y = 36 + -6

Combine like terms: 36 + -6 = 30
21 + -3y = 30

Solving
21 + -3y = 30

Solving for variable 'y'.

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

Add '-21' to each side of the equation.
21 + -21 + -3y = 30 + -21

Combine like terms: 21 + -21 = 0
0 + -3y = 30 + -21
-3y = 30 + -21

Combine like terms: 30 + -21 = 9
-3y = 9

Divide each side by '-3'.
y = -3

Simplifying
y = -3

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