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2.6(k+2.1)=8.58
We move all terms to the left:
2.6(k+2.1)-(8.58)=0
We add all the numbers together, and all the variables
2.6(k+2.1)-8.58=0
We multiply parentheses
2.6k+5.46-8.58=0
We add all the numbers together, and all the variables
2.6k-3.12=0
We move all terms containing k to the left, all other terms to the right
2.6k=3.12
k=3.12/2.6
k=1+0.52/2.6
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