7k+4k-7k-2k=20

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Solution for 7k+4k-7k-2k=20 equation: 



7k+4k-7k-2k=20

We move all terms to the left:

7k+4k-7k-2k-(20)=0

We add all the numbers together, and all the variables

2k-20=0

We move all terms containing k to the left, all other terms to the right

2k=20

k=20/2

k=10

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