0.9*x+0.5*y=80

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Solution for 0.9*x+0.5*y=80 equation: 


Simplifying
0.9x + 0.5y = 80

Solving
0.9x + 0.5y = 80

Solving for variable 'x'.

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

Add '-0.5y' to each side of the equation.
0.9x + 0.5y + -0.5y = 80 + -0.5y

Combine like terms: 0.5y + -0.5y = 0.0
0.9x + 0.0 = 80 + -0.5y
0.9x = 80 + -0.5y

Divide each side by '0.9'.
x = 88.88888889 + -0.5555555556y

Simplifying
x = 88.88888889 + -0.5555555556y

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