5y+4x=80

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Solution for 5y+4x=80 equation: 


Simplifying
5y + 4x = 80

Reorder the terms:
4x + 5y = 80

Solving
4x + 5y = 80

Solving for variable 'x'.

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

Add '-5y' to each side of the equation.
4x + 5y + -5y = 80 + -5y

Combine like terms: 5y + -5y = 0
4x + 0 = 80 + -5y
4x = 80 + -5y

Divide each side by '4'.
x = 20 + -1.25y

Simplifying
x = 20 + -1.25y

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