0.50+0.20(100-x)=0.40(100)

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Solution for 0.50+0.20(100-x)=0.40(100) equation: 


Simplifying
0.50 + 0.20(100 + -1x) = 0.40(100)
0.50 + (100 * 0.20 + -1x * 0.20) = 0.40(100)
0.50 + (20 + -0.2x) = 0.40(100)

Combine like terms: 0.50 + 20 = 20.5
20.5 + -0.2x = 0.40(100)

Multiply 0.40 * 100
20.5 + -0.2x = 40

Solving
20.5 + -0.2x = 40

Solving for variable 'x'.

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

Add '-20.5' to each side of the equation.
20.5 + -20.5 + -0.2x = 40 + -20.5

Combine like terms: 20.5 + -20.5 = 0.0
0.0 + -0.2x = 40 + -20.5
-0.2x = 40 + -20.5

Combine like terms: 40 + -20.5 = 19.5
-0.2x = 19.5

Divide each side by '-0.2'.
x = -97.5

Simplifying
x = -97.5

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