.50(20-x)+.75y=11.50

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Solution for .50(20-x)+.75y=11.50 equation:


Simplifying
0.50(20 + -1x) + 0.75y = 11.50
(20 * 0.50 + -1x * 0.50) + 0.75y = 11.50
(10 + -0.5x) + 0.75y = 11.50

Solving
10 + -0.5x + 0.75y = 11.50

Solving for variable 'x'.

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

Add '-10' to each side of the equation.
10 + -0.5x + -10 + 0.75y = 11.50 + -10

Reorder the terms:
10 + -10 + -0.5x + 0.75y = 11.50 + -10

Combine like terms: 10 + -10 = 0
0 + -0.5x + 0.75y = 11.50 + -10
-0.5x + 0.75y = 11.50 + -10

Combine like terms: 11.50 + -10 = 1.5
-0.5x + 0.75y = 1.5

Add '-0.75y' to each side of the equation.
-0.5x + 0.75y + -0.75y = 1.5 + -0.75y

Combine like terms: 0.75y + -0.75y = 0.00
-0.5x + 0.00 = 1.5 + -0.75y
-0.5x = 1.5 + -0.75y

Divide each side by '-0.5'.
x = -3 + 1.5y

Simplifying
x = -3 + 1.5y

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