You can find my number if you find the difference of 4,879 and 23,041, then add 163 to the answer

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

b.-4 units

all you   do is count how many times you move