X=-3+y just do it like that and substitute them in and x and y ending with is your answer
Say the first number is x, you would then have x and 6x and then x + 100. If you add all these together you get 8x + 100 = 708. You then subtract both sides by 100 and get 8x = 608. Divide both sides by 8 and you get 608/8 which = 76.
Let y= how many lollipops he has left
Let x= how many friends he has
Answer: its 40
Step-by-step explanation: