.55x+.75(200-x)=128.8

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Solution for .55x+.75(200-x)=128.8 equation:


Simplifying
0.55x + 0.75(200 + -1x) = 128.8
0.55x + (200 * 0.75 + -1x * 0.75) = 128.8
0.55x + (150 + -0.75x) = 128.8

Reorder the terms:
150 + 0.55x + -0.75x = 128.8

Combine like terms: 0.55x + -0.75x = -0.2x
150 + -0.2x = 128.8

Solving
150 + -0.2x = 128.8

Solving for variable 'x'.

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

Add '-150' to each side of the equation.
150 + -150 + -0.2x = 128.8 + -150

Combine like terms: 150 + -150 = 0
0 + -0.2x = 128.8 + -150
-0.2x = 128.8 + -150

Combine like terms: 128.8 + -150 = -21.2
-0.2x = -21.2

Divide each side by '-0.2'.
x = 106

Simplifying
x = 106

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