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WITCHER [35]
3 years ago
11

I can't seem to figure out this problem -4q + 9 = 7q - 31 ​

Mathematics
2 answers:
Nikolay [14]3 years ago
6 0

Answer:

\large\boxed{q=\dfrac{40}{11}}

Step-by-step explanation:

-4q+9=7q-31\qquad\text{subtract 9 from both sides}\\\\-4q+9-9=7q-31-9\\\\-4q=7q-40\qquad\text{subtract }\ 7q\ \text{from both sides}\\\\-4q-7q=7q-7q-40\\\\-11q=-40\qquad\text{divide both sides by -11}\\\\\dfrac{-11q}{-11}=\dfrac{-40}{-11}\\\\q=\dfrac{40}{11}

Kipish [7]3 years ago
3 0

Answer:

q = 3.636363636 repeating

Step-by-step explanation:

  - 4q + 9 = 7q - 31

   + 4q      + 4q

     9 = 11q - 31

  + 31         + 31

      40 = 11q

      \frac{40}{11} = \frac{11q}{11}

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If the distance is 45 miles and speed of both cyclist is 14 and 16 miles per hour then they will take time of 1.5 hour to meet.

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