Decide What Values of the Variable Cannot Possibly Be Solutions $\frac { 14 } { 5 } \mathrm { hr }$

Decide what values of the variable cannot possibly be solutions for the equation.
-Frank can type a report in 7 hours. James takes 2 hours to type it. How long will it take the two of 312) them typing together?

A) $\frac { 14 } { 5 } \mathrm { hr }$

B) $\frac { 1 } { 9 } \mathrm { hr }$

C) $\frac { 1 } { 14 } \mathrm { hr }$

D) $\frac { 14 } { 9 } \mathrm { hr }$

Correct Answer:

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