A group of students went to the fast-food restaurant after a game. They each ordered a 6-pc nugget entrée and a garden salad tray to share. Each student was given a $5 gift card to use. Solve the equation 3.20n + 9 = 5n to determine the number of friends n who went to the restaurant. Justify each step.
I’m guessing you want to find out (n). That’s what I did anyway.
The answer is: n=5
Step 1: Subtract 5n from both sides. 3.2 n + 9 − 5 n = 5 n − 5 n − 1.8 n + 9 = 0 Step 2: Subtract 9 from both sides. − 1.8 n + 9 − 9 = 0 − 9 − 1.8 n = − 9 Step 3: Divide both sides by -1.8. − 1.8 n − 1.8 = − 9 − 1.8 n = 5
