4.2k+3=-5.4

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Solution for 4.2k+3=-5.4 equation: 


Simplifying
4.2k + 3 = -5.4

Reorder the terms:
3 + 4.2k = -5.4

Solving
3 + 4.2k = -5.4

Solving for variable 'k'.

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

Add '-3' to each side of the equation.
3 + -3 + 4.2k = -5.4 + -3

Combine like terms: 3 + -3 = 0
0 + 4.2k = -5.4 + -3
4.2k = -5.4 + -3

Combine like terms: -5.4 + -3 = -8.4
4.2k = -8.4

Divide each side by '4.2'.
k = -2

Simplifying
k = -2

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