Question

-15X - 40 = 23 - 8 This is the problem and I am totally lost

Answer 1

-15x-40=15
then add 40 to both sides to get the constants on 1 side and variables on the other
-15x=25
now you just divide by -15
x = -1.67 or x = -1/3

Answer 2

Subtract 8 from both sides