My number is -6
Let the number I am thinking of be x
If I multiply by -4 (-4 * x = -4x)
Then subtract 5 ; -4x-5
My result is 19;
-4x - 5 = 19
We proceed to solve this equation so as to get the value of x which is the unknown number.
Thus;
-4x = 19 + 5
-4x = 24
x = 24/-4
x = -6
