2.1k+3=7.2

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Solution for 2.1k+3=7.2 equation: 



2.1k+3=7.2

We move all terms to the left:

2.1k+3-(7.2)=0

We add all the numbers together, and all the variables

2.1k-4.2=0

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

2.1k=4.2

k=4.2/2.1

k=2

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