7k-6+3k+18=90

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Solution for 7k-6+3k+18=90 equation: 


Simplifying
7k + -6 + 3k + 18 = 90

Reorder the terms:
-6 + 18 + 7k + 3k = 90

Combine like terms: -6 + 18 = 12
12 + 7k + 3k = 90

Combine like terms: 7k + 3k = 10k
12 + 10k = 90

Solving
12 + 10k = 90

Solving for variable 'k'.

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

Add '-12' to each side of the equation.
12 + -12 + 10k = 90 + -12

Combine like terms: 12 + -12 = 0
0 + 10k = 90 + -12
10k = 90 + -12

Combine like terms: 90 + -12 = 78
10k = 78

Divide each side by '10'.
k = 7.8

Simplifying
k = 7.8

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