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We can solve this question in the following way:
We have that Pat has walked 3 blocks in 7 minutes, and now, we can post the following: how long will it take to walk 9 blocks?
Then, we have:
Then, we can solve for x as follows:
We need to multiply 9 blocks by 7 minutes, and then we divide the result by 3 blocks (see the red lines).
[tex]x=\frac{9bl\cdot7\min}{3bl}\Rightarrow x=\frac{63\min}{3}\Rightarrow x=21\min [/tex]This answer comes from having into account the following proportion:
[tex]\frac{9bl}{3bl}=\frac{x}{7\min}\Rightarrow x=\frac{9bl\cdot7\min}{3bl}=21\min [/tex](We have here proportional quantities.)
It will take 21 min to walk the 9 blocks. However, Pat has walked for 7 minutes. Therefore, Pat needs to walk for (21 min - 7 min) = 14 minutes.
Therefore, Pat will need to walk for 14 minutes more to reach the restaurant.
