Question 977330
1/a+1/b=1/x
1/2.5+1/6=1/x
6/15.0+2.5/15.0=1/x
8.5/15.0=1/x
x=15.0/8.5
x=1.76470588 hours working together
check
x/a+x/b=1
x/2.5+x/6=1
1.76470588/2.5+1.76470588/6=1
0.70588235+0.29411765=1
1.0=1
ok
codewt