Question

A number was multiples by -4 then this product was increased by 4. If the result was -24 what was the number.

Answer 1

N = 7

(n * -4) + 4 = -24
             -4      -4

Subtract 4 from both sides.
Now you should have 
(n * -4) = -28
Now multiply n by -4 (you could've also done this before subtracting 4)

This should cause your equation to be 
-4n = -28
Divide both sides by -4 in order to get n by itself (or make it equal 1)

n = 7

Answer 2

This is how I would do it atleast