Answer:
x = 20 or x = -20
Explanations:
The given equation is:

The equation will be splitted into two and solve differently

For 2x/5 =8
Cross multiply
2x = 8(5)
2x = 40
x = 40/2
x = 20
For 2x/5 = -8
Cross multiply
2x = -8(5)
2x = -40
x = -40/2
x = -20
x = 20 or x = -20