Answer:
18
Explanation:
The triangle is a right triangle with sides 3x, 4x, 5x.
5x = 30
x = 6
3x = 3(6) = 18
Answer: 18
x= 6
by using Pythagoras theorem
(30)={(9x^2+ 16x^2)}1/2
30= 5x
x= 30/5
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