2y+y+21=360

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Solution for 2y+y+21=360 equation:


Simplifying
2y + y + 21 = 360

Reorder the terms:
21 + 2y + y = 360

Combine like terms: 2y + y = 3y
21 + 3y = 360

Solving
21 + 3y = 360

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 = 360 + -21

Combine like terms: 21 + -21 = 0
0 + 3y = 360 + -21
3y = 360 + -21

Combine like terms: 360 + -21 = 339
3y = 339

Divide each side by '3'.
y = 113

Simplifying
y = 113

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