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Algebra
Pregunta

7. \( \frac { x + 3 } { x ^ { 2 } - 1 } - \frac { ...

7. \( \frac { x + 3 } { x ^ { 2 } - 1 } - \frac { 2 x - 1 } { 7 x + 2 } = \frac { 3 x - 5 } { 7 x + 2 } \) 

8. An inlet water pipe can fill a tank in \( 6 \) hours. An hour after this pipe has been open a second inlet pipe is opened and, together, the tank is filled in \( 3 \) more hours. How much time would it take for the second pipe to fill the tank by itself? 

Answer

7.

 

8. 9 hours

Solución
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