Answer:
21
Explanation:
You take 24 and divide it by 72
24/72
=
1/3
or in decimal form
0.333333
Then you take 25 and divide it by 75
25/75
=
1/3
0.333333
This means now you can find x
Take 7 and divide it by x
7/x = 1/3
(it equals 1/3 because you are trying to get it to be the same as the other two sides)
Therefore x equals 21
You can check your answer by plugging in 21
7/21
=
1/3
0.333333
Viola