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-k+12.8=-0.07-2.1k
We move all terms to the left:
-k+12.8-(-0.07-2.1k)=0
We add all the numbers together, and all the variables
-k-(-2.1k-0.07)+12.8=0
We add all the numbers together, and all the variables
-1k-(-2.1k-0.07)+12.8=0
We get rid of parentheses
-1k+2.1k+0.07+12.8=0
We add all the numbers together, and all the variables
1.1k+12.87=0
We move all terms containing k to the left, all other terms to the right
1.1k=-12.87
k=-12.87/1.1
k=-11+0.77/1.1
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