Answer:
The length of x is 2 units
Explanation:
First of all we have to know the formula to calculate the area of a triangle:
a = area = 5u²
h = heigth = 5u
b = base
a = (b * h) / 2
we replace with the known values
5u² = (b * 5u) / 2
5u² * 2 = b * 5u
10u² / 5u = b
2u = b
The length of x is 2 units