Answer:the equation would be something like 30=5x+10
Step-by-step explanation:we know the total is 30 miles
he ran 5 days
the morning run is 2 miles
2*5=10
10 plus the unknown miles times 5 days gives us 30
so 30=5x+10 subtract 10 both sides
20= 5x=20
divide both sides by 5
x=4