Y+y+2y-20+2y-20+2y-20+2y-20=720

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Solution for Y+y+2y-20+2y-20+2y-20+2y-20=720 equation: 


Simplifying
Y + y + 2y + -20 + 2y + -20 + 2y + -20 + 2y + -20 = 720

Reorder the terms:
-20 + -20 + -20 + -20 + Y + y + 2y + 2y + 2y + 2y = 720

Combine like terms: -20 + -20 = -40
-40 + -20 + -20 + Y + y + 2y + 2y + 2y + 2y = 720

Combine like terms: -40 + -20 = -60
-60 + -20 + Y + y + 2y + 2y + 2y + 2y = 720

Combine like terms: -60 + -20 = -80
-80 + Y + y + 2y + 2y + 2y + 2y = 720

Combine like terms: y + 2y = 3y
-80 + Y + 3y + 2y + 2y + 2y = 720

Combine like terms: 3y + 2y = 5y
-80 + Y + 5y + 2y + 2y = 720

Combine like terms: 5y + 2y = 7y
-80 + Y + 7y + 2y = 720

Combine like terms: 7y + 2y = 9y
-80 + Y + 9y = 720

Solving
-80 + Y + 9y = 720

Solving for variable 'Y'.

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

Add '80' to each side of the equation.
-80 + Y + 80 + 9y = 720 + 80

Reorder the terms:
-80 + 80 + Y + 9y = 720 + 80

Combine like terms: -80 + 80 = 0
0 + Y + 9y = 720 + 80
Y + 9y = 720 + 80

Combine like terms: 720 + 80 = 800
Y + 9y = 800

Add '-9y' to each side of the equation.
Y + 9y + -9y = 800 + -9y

Combine like terms: 9y + -9y = 0
Y + 0 = 800 + -9y
Y = 800 + -9y

Simplifying
Y = 800 + -9y

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