0.5(4-k)=0.4

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Solution for 0.5(4-k)=0.4 equation: 


Simplifying
0.5(4 + -1k) = 0.4
(4 * 0.5 + -1k * 0.5) = 0.4
(2 + -0.5k) = 0.4

Solving
2 + -0.5k = 0.4

Solving for variable 'k'.

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

Add '-2' to each side of the equation.
2 + -2 + -0.5k = 0.4 + -2

Combine like terms: 2 + -2 = 0
0 + -0.5k = 0.4 + -2
-0.5k = 0.4 + -2

Combine like terms: 0.4 + -2 = -1.6
-0.5k = -1.6

Divide each side by '-0.5'.
k = 3.2

Simplifying
k = 3.2

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