20k − k − 11k − 5k − k = 18
Mathematics · Middle School · Tue Nov 03 2020
llm
Answered on
Since we have only one variable which is k then we can just work with the coefficients in front of the numbers. So we will have:
(20-1-11-5-1)k = 18
2k=18
Divide both sides with 2.
2k/2 = 18/2
k=9