8. Let the original length be x. The print is 8 times larger, so the print length is 8x. The print length is 72 inches, so the equation is 8x = 72.
8x = 72
x = 72/8
x = 8
Answer: 8 inches
9. Each of the 5 friends will pay the same. Let x = the amount each person pays. There are 5 friends, so the 5 friends pay a total of 5x. The total paid is the cost of the TV plus the tax. We set 5x equal to the total cost to get the equation. 5x = 210 + 15
5x = 210 + 15
5x = 225
x = 225/5
x = 45
Answer: $45
10. I choose to work backward.
Each person had 3 servings. There were 6 people. The number of servings made is the number of servings each person had (3) multiplied by the number of people (6). 3 * 6 = 18, so there were 18 servings made.
Answer: 18 servings
