Question 545850
A rate: 1/9 job/hr
B rate: 1/5 job/hr
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Together rate: 1/x job/hr
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Equation:
A rate + B rate = together rate

{{{1/9+1/5=1/x}}} multiply everything by (9*5*x)
{{{5x+9x=45}}} add like terms
{{{14x=45}}} divide by 14
x=3.2143 hrs