.25x+.40(100-x)=13

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Solution for .25x+.40(100-x)=13 equation:


Simplifying
0.25x + 0.40(100 + -1x) = 13
0.25x + (100 * 0.40 + -1x * 0.40) = 13
0.25x + (40 + -0.4x) = 13

Reorder the terms:
40 + 0.25x + -0.4x = 13

Combine like terms: 0.25x + -0.4x = -0.15x
40 + -0.15x = 13

Solving
40 + -0.15x = 13

Solving for variable 'x'.

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

Add '-40' to each side of the equation.
40 + -40 + -0.15x = 13 + -40

Combine like terms: 40 + -40 = 0
0 + -0.15x = 13 + -40
-0.15x = 13 + -40

Combine like terms: 13 + -40 = -27
-0.15x = -27

Divide each side by '-0.15'.
x = 180

Simplifying
x = 180

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