Answer :

10.85 / 1.55 = 7

10.85 / 7 = 1.55

The missing number is 7.

Hope this helps!
10.85 = 1.55x
10.85/1.55 = x
x = 7

Answer: 7 is your missing number because 10.85/7 = 1.55 is true.

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