y+2y=90

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Solution for y+2y=90 equation: 


Simplifying
y + 2y = 90

Combine like terms: y + 2y = 3y
3y = 90

Solving
3y = 90

Solving for variable 'y'.

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

Divide each side by '3'.
y = 30

Simplifying
y = 30

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