Question 1165846
so total distance on bike was 13y miles
and running is 5x miles
5x+13y=32
x+y=4, so x=4-y
5(4-y)+13y=32
20-5y+13y=32
8y=12
y=1.5 hours on the bike or 19.5 miles
x=2.5 hours running or 12.5 miles