Question

Alex divides by 2, then adds 5 to get an answer of 4. What was the original number?

Answer 1

-2

Explanation:

(Let x = the original number)

x/2 + 5 = 4

subtract 5 from both sides

x/2 = -1

multiply both sides by 2 to isolate x

x = -2

The original number was -2.