System of Equations Word Problem Involving Distance, Rate, and Time (d=r*t)

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In this video we discuss how to approach a word problem involving making a table using distance = rate * time. We show how to solve the system using elimination to find the speed of the current.

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Math comes so naturally and smoothly to you Mario. It is a pleasure to watch your videos.

adnkir
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Hello sir, where did you get the 7 and -3 in 2:10, and why is the 3 negative?

carljosephborja
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Thank you but there is another solution,
Distance =speedxtime
21=3*speed
Speed =7mi/h
Now coming back
Distance =speed0+speedXtime
21=7+speed*7
Speed =2 mi/h

alihamchou
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1st to like and comment I dislike math

sky-hvzo