Answer: here is the simplify version −642+321i
Step-by-step explanation:
Step-by-step explanation:

Well, all you have to do to solve this is multiply 850 times 10, which is 8,500, so that means there are 8 thousands.
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10x-3(x-6)=-(x-1)
first distribute
10x -3x +18 = -x + 1
then you simplify
7 x +18 = -x +1
then you leave of when one side of x
6 x +18= +1
use opposite operation on the side with the x and do the same equation to the other side
6 x = -17
then divide
x = - 2.8333....