(3x + 5) + 8x - 4 , need answer step by step

Hello!

To solve this problem, we need to combine like terms (such as coefficients and variables or whole numbers).
3x+5+8x-4

We can combine 3x and 8x giving us 11x
11x+5-4

We can now combine 5 and -4, giving us 1

11x+1

Since we cannot combine 11x and one, it is our final answer.

11x+1

Hope this helps!