100(1-x)=0.75(20)+80(1-y)

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Solution for 100(1-x)=0.75(20)+80(1-y) equation: 


Simplifying
100(1 + -1x) = 0.75(20) + 80(1 + -1y)
(1 * 100 + -1x * 100) = 0.75(20) + 80(1 + -1y)
(100 + -100x) = 0.75(20) + 80(1 + -1y)

Multiply 0.75 * 20
100 + -100x = 15 + 80(1 + -1y)
100 + -100x = 15 + (1 * 80 + -1y * 80)
100 + -100x = 15 + (80 + -80y)

Combine like terms: 15 + 80 = 95
100 + -100x = 95 + -80y

Solving
100 + -100x = 95 + -80y

Solving for variable 'x'.

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

Add '-100' to each side of the equation.
100 + -100 + -100x = 95 + -100 + -80y

Combine like terms: 100 + -100 = 0
0 + -100x = 95 + -100 + -80y
-100x = 95 + -100 + -80y

Combine like terms: 95 + -100 = -5
-100x = -5 + -80y

Divide each side by '-100'.
x = 0.05 + 0.8y

Simplifying
x = 0.05 + 0.8y

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