.40(x)+.80(20-x)=11

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Solution for .40(x)+.80(20-x)=11 equation:


Simplifying
0.40(x) + 0.80(20 + -1x) = 11
0.40x + (20 * 0.80 + -1x * 0.80) = 11
0.40x + (16 + -0.8x) = 11

Reorder the terms:
16 + 0.40x + -0.8x = 11

Combine like terms: 0.40x + -0.8x = -0.4x
16 + -0.4x = 11

Solving
16 + -0.4x = 11

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + -0.4x = 11 + -16

Combine like terms: 16 + -16 = 0
0 + -0.4x = 11 + -16
-0.4x = 11 + -16

Combine like terms: 11 + -16 = -5
-0.4x = -5

Divide each side by '-0.4'.
x = 12.5

Simplifying
x = 12.5

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