Question 1103719
1/a+1/b=1/x
1/8+1/11=1/x
11/88+8/88=1/x
19/88=1/x
x=88/19
x=4.63157895 hours working together
check
x/a+x/b=1
x/8+x/11=1
4.63157895/8+4.63157895/11=1
0.57894737+0.42105263=1
1.0=1
ok
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