Isabel has 10 boards that are x meters long. She has

5 boards that are 2x meters long. She also has 4

boards that measure 3 meters, 6 meters, 9 meters,

and 13 meters, respectively. If she were to lay all

her boards in a straight line with no gaps between

them, the boards would measure 271 meters.

What is the value of x?

E. 5 meters

F. 6 meters

G. 10 meters

H. 12 meters

Answer: H. 12 meters

Step-by-step explanation:

Hi, to answer this question we have to sum all the boards' lengths. That expression must be equal to 271.

Mathematically speaking:

10x + 5 (2x) + 3+6+9+13=271

Solving for x:

10x + 10x + 3+6+9+13 = 271

20x+31 = 271

20x = 271-31

20x = 240

x = 240/20

x = 12

Feel free to ask for more if needed or if you did not understand something.