.3x+.2y-80=0

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Solution for .3x+.2y-80=0 equation: 


Simplifying
0.3x + 0.2y + -80 = 0

Reorder the terms:
-80 + 0.3x + 0.2y = 0

Solving
-80 + 0.3x + 0.2y = 0

Solving for variable 'x'.

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

Add '80' to each side of the equation.
-80 + 0.3x + 80 + 0.2y = 0 + 80

Reorder the terms:
-80 + 80 + 0.3x + 0.2y = 0 + 80

Combine like terms: -80 + 80 = 0
0 + 0.3x + 0.2y = 0 + 80
0.3x + 0.2y = 0 + 80

Combine like terms: 0 + 80 = 80
0.3x + 0.2y = 80

Add '-0.2y' to each side of the equation.
0.3x + 0.2y + -0.2y = 80 + -0.2y

Combine like terms: 0.2y + -0.2y = 0.0
0.3x + 0.0 = 80 + -0.2y
0.3x = 80 + -0.2y

Divide each side by '0.3'.
x = 266.6666667 + -0.6666666667y

Simplifying
x = 266.6666667 + -0.6666666667y

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