Answer:
The factor is 1
Explanation:
7*9 = (7*10) - (7*x) Original Problem
63 = 70 - 7x Expand: It says we need to subtract 7 x times from 70,
with a value of x such that the result in 63.
-7 = -7x Solve
x = 1 & needs to be subracted just once
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