X+3y+6y=20

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Solution for X+3y+6y=20 equation: 


Simplifying
X + 3y + 6y = 20

Combine like terms: 3y + 6y = 9y
X + 9y = 20

Solving
X + 9y = 20

Solving for variable 'X'.

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

Add '-9y' to each side of the equation.
X + 9y + -9y = 20 + -9y

Combine like terms: 9y + -9y = 0
X + 0 = 20 + -9y
X = 20 + -9y

Simplifying
X = 20 + -9y

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