.3k+0.5k+13=1

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Solution for .3k+0.5k+13=1 equation: 


Simplifying
0.3k + 0.5k + 13 = 1

Reorder the terms:
13 + 0.3k + 0.5k = 1

Combine like terms: 0.3k + 0.5k = 0.8k
13 + 0.8k = 1

Solving
13 + 0.8k = 1

Solving for variable 'k'.

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

Add '-13' to each side of the equation.
13 + -13 + 0.8k = 1 + -13

Combine like terms: 13 + -13 = 0
0 + 0.8k = 1 + -13
0.8k = 1 + -13

Combine like terms: 1 + -13 = -12
0.8k = -12

Divide each side by '0.8'.
k = -15

Simplifying
k = -15

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