3y-y=21-5

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Solution for 3y-y=21-5 equation: 


Simplifying
3y + -1y = 21 + -5

Combine like terms: 3y + -1y = 2y
2y = 21 + -5

Combine like terms: 21 + -5 = 16
2y = 16

Solving
2y = 16

Solving for variable 'y'.

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

Divide each side by '2'.
y = 8

Simplifying
y = 8

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