Okay the other answer is wrong
The correct answer is 28x+20
You multiply both 10x and 8 by 2.5 which is using distributive property. Then you get 25x +20+3x. After you get this you need to add like terms. In this case it’s 25x and 3x so if you add them together you get 28x. Put it all together and you get 28x+20