0.3k+1.4=4.2+-0.1k

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Solution for 0.3k+1.4=4.2+-0.1k equation: 


Simplifying
0.3k + 1.4 = 4.2 + -0.1k

Reorder the terms:
1.4 + 0.3k = 4.2 + -0.1k

Solving
1.4 + 0.3k = 4.2 + -0.1k

Solving for variable 'k'.

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

Add '0.1k' to each side of the equation.
1.4 + 0.3k + 0.1k = 4.2 + -0.1k + 0.1k

Combine like terms: 0.3k + 0.1k = 0.4k
1.4 + 0.4k = 4.2 + -0.1k + 0.1k

Combine like terms: -0.1k + 0.1k = 0.0
1.4 + 0.4k = 4.2 + 0.0
1.4 + 0.4k = 4.2

Add '-1.4' to each side of the equation.
1.4 + -1.4 + 0.4k = 4.2 + -1.4

Combine like terms: 1.4 + -1.4 = 0.0
0.0 + 0.4k = 4.2 + -1.4
0.4k = 4.2 + -1.4

Combine like terms: 4.2 + -1.4 = 2.8
0.4k = 2.8

Divide each side by '0.4'.
k = 7

Simplifying
k = 7

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