Answer:
5
Step-by-step explanation:
The answers equivilant to 3 are 1,5,7
Pick the angle is closer to the middle (interior). 5
A non-negative root of a number is called Square Root
3x : 2 = 15
3x = 15 * 2
3x = 30
x = 30 : 3
x = 10
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3(10) :2 = 15
