2x+y+3x-3y=90

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Solution for 2x+y+3x-3y=90 equation: 


Simplifying
2x + y + 3x + -3y = 90

Reorder the terms:
2x + 3x + y + -3y = 90

Combine like terms: 2x + 3x = 5x
5x + y + -3y = 90

Combine like terms: y + -3y = -2y
5x + -2y = 90

Solving
5x + -2y = 90

Solving for variable 'x'.

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

Add '2y' to each side of the equation.
5x + -2y + 2y = 90 + 2y

Combine like terms: -2y + 2y = 0
5x + 0 = 90 + 2y
5x = 90 + 2y

Divide each side by '5'.
x = 18 + 0.4y

Simplifying
x = 18 + 0.4y

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