Question 1095245
Only if the combined rates are truly additive,...


{{{1/x=1/9+1/5}}}, rate unit being JOBs per DAY

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{{{9*5*x(1/x)=9*5*x(1/9+1/5)}}}

{{{45=5x+9x}}}

{{{14x=45}}}

{{{x=45/14}}}


{{{x=3&3/14}}}; just a little more than 3 days.