Problem situation: bernie spends $6.50 on ingredients and cups for his lemonade stand. he charges $1.50 for each cup of lemonade. how many cups, x, will bernie need to sell to make a profit of at least $20? inequality that represents this situation: 20≤1.50x−6.50 drag each number to show if it is a solution to both the inequality and the problem situation, to the inequality only, or if it is not a solution.

If gravity is one third on mars then weight also one third on mars

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.