7k-3=42

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Solution for 7k-3=42 equation: 


Simplifying
7k + -3 = 42

Reorder the terms:
-3 + 7k = 42

Solving
-3 + 7k = 42

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 + 7k = 42 + 3

Combine like terms: -3 + 3 = 0
0 + 7k = 42 + 3
7k = 42 + 3

Combine like terms: 42 + 3 = 45
7k = 45

Divide each side by '7'.
k = 6.428571429

Simplifying
k = 6.428571429

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