First you had subtract by ten from both sides of equation form.
Then simplify by equation.
Final answer: 
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-Charlie
-2a^2 - 25ab - 27b^2
hope this helps :)
Answer:
0.321, 0.32...(Line means it is repeated), 2.52, 2.5...
k/9-1=12
We move all terms to the left:
k/9-1-(12)=0
We add all the numbers together, and all the variables
k/9-13=0
We multiply all the terms by the denominator
k-13*9=0
We add all the numbers together, and all the variables
k-117=0
We move all terms containing k to the left, all other terms to the right
k=117
