3y-21=63

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Solution for 3y-21=63 equation: 


Simplifying
3y + -21 = 63

Reorder the terms:
-21 + 3y = 63

Solving
-21 + 3y = 63

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 = 63 + 21

Combine like terms: -21 + 21 = 0
0 + 3y = 63 + 21
3y = 63 + 21

Combine like terms: 63 + 21 = 84
3y = 84

Divide each side by '3'.
y = 28

Simplifying
y = 28

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