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In seventh grade, winter vacation homework's answer was urgent! ~
Brother had already left 2 * 1 = 2km when he set out.

It will take my brother x hours to catch up with my brother.

6X=2X+2* 1 Equation On the left is the distance my brother walked, and on the right is the equation when my brother met him.

X=0.5 hours

Flower dog has been running all the time in this process.

16 * 0.5 = 8km

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