Find the value of 3x+5(x+9)-4x, when x=-5.

3x + 5(x+9) - 4x when x = -5

(substitute x with -5)

Here are the steps:

1. +3 times -5 = -15

2. +5 times -5 = -25

3. +5 times +9 = +45

4. -4 x -5 = +20

Then you add: -15 -25 +45 +20 = 25

example: -15-25= -40+45 = +5 +20 =25