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-8.4x-9.9=-6.5
We move all terms to the left:
-8.4x-9.9-(-6.5)=0
We add all the numbers together, and all the variables
-8.4x-3.4=0
We move all terms containing x to the left, all other terms to the right
-8.4x=3.4
x=3.4/-8.4
x=-2.4285714285714/6
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