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-6.4z-5=-14
We move all terms to the left:
-6.4z-5-(-14)=0
We add all the numbers together, and all the variables
-6.4z+9=0
We move all terms containing z to the left, all other terms to the right
-6.4z=-9
z=-9/-6.4
z=1+1/2.4615384615385
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