Question

Subtract 20 from x is the same as multiplying x by what number

Answer 1

x - 20 = x*y
-20 = x*y-x
-20 = x*y-x*1
-20 = x(y-1)
20= -x(y-1)

Answer 2

Answer:

Let the number be y.

So, According to the question

xy = x-20

y = (x-20)/x

Since, it is not mentioned that x is positive or negative number etc.

we take x as a real number.

Thus, For infinite values of x we have infinite values of y.

Except x = 0 as for x = 0 value of y is not defined.