5k+2.8=3.9

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Solution for 5k+2.8=3.9 equation: 


Simplifying
5k + 2.8 = 3.9

Reorder the terms:
2.8 + 5k = 3.9

Solving
2.8 + 5k = 3.9

Solving for variable 'k'.

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

Add '-2.8' to each side of the equation.
2.8 + -2.8 + 5k = 3.9 + -2.8

Combine like terms: 2.8 + -2.8 = 0.0
0.0 + 5k = 3.9 + -2.8
5k = 3.9 + -2.8

Combine like terms: 3.9 + -2.8 = 1.1
5k = 1.1

Divide each side by '5'.
k = 0.22

Simplifying
k = 0.22

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