Question

What is the value of x?

Enter your answer in the box.

Answer 1

9 cm

Explanation:

9/(9+72) = (3x-20)/(3x-20+56)

9/81 = (3x-20)/(3x+36)

1/9 = (3x-20)/(3x+36)

3x + 36 = 27x - 180

24x = 216

x = 9cm

Answer 2

x=9

Explanation:

`(9)/(72) = (3x - 20)/(56)`

Cross multiply

`504 = 216x - 1440`

Transfer and isolate

`(504 + 1440 = 216x)/(216)`

`(1944 = 216x)/(216)`

`9 = x`