Question

18 less than four times a number is 5.

Answer 1

Assuming you wanted to find that mystery number:

It would be 5.75.

Explanation:

5 = 4x - 18

Add 18 to both sides of the equation:

5 + 18 = 4x - 18 + 18

23 = 4x - 18 + 18

23 = 4x

Divide each side by 4:

(23/4) = (4x/4)

23/4 = x

5.75 = x

x = 5.75

Answer 2

I think the mathematical equation for this sentence is

(Step 1)

4x-18=5 Add 18 to both sides to get the numbers on the same

+18 | +18 Side of the equals sign.

----------------------

4x =23

(Step 2)

4x =23 / 4 Divide equation by four

x=5.75 The answer is X=5.75

Hope I was able to help :)