Answer:
x = 10
Explanation:
given y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
to find k , substitute y = 25 when x = 5 into the equation
25 = 5k ( divide both sides by 5 )
5 = k
y = 5x ← equation of variation
when y = 50 , then
50 = 5x ( divide both sides by 5 )
10 = x