Question

A group of 9 friends go out to dessert and spend $72.45 including tax.
which costs $8 or a fruit salad which costs $5. The tax on the bill was
ice cream sundae and how many ordered a fruit salad?

Answer 1

I’m not sure about this one but you previous ques was solved

(X+40) (3x-20)

Just multiply them first

3x^2 - 20x + 120x - 800

3x^2 - 100x - 800