Question

15. Set up a proportion and use it to solve for x. Show your work.
2
10
X
3

Answer 1

x = 15

Explanation:

Create a proportional relationship to solve for x

3/2 = x/10

Cross multiply

2x = 30

Divide both sides by 2

x = 15

Answer 2

Explanation:

10/(10 + 2) = x/(x + 3) Combine left denominator

10/12 = x/(x + 3) Cross multiply

10(x + 3) = 12*x Remove the brackets on the left

10x + 30 = 12x Subtract 10x from both sides

-10x -10x

30 = 2x Divide by 2

2x/2 = 30/2

x = 15