Answer:
x = 4
Step-by-step explanation:
Given y is inversely proportional to x then the equation relating them is
y =
← k is the constant of proportion
To find k use the condition when y = 10, x = 2 , then
10 =
( multiply both sides by 2 )
20 = k
y =
← equation of proportion
When y = 5
5 =
( multiply both sides by x )
5x = 20 ( divide both sides by 5 )
x = 4