Question 911092
1/a+1/b=1/x
1/2+1/3=1/x
3/6+2/6=1/x
5/6=1/x
x=6/5
x=1.2 hours working together
check
x/a+x/b=1
x/2+x/3=1
1.2/2+1.2/3=1
0.6+0.4=1
1.0=1
ok
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