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### Course: 6th grade (Illustrative Mathematics)>Unit 6

Lesson 5: Lesson 5: A new way to interpret a over b

# One-step multiplication equations: fractional coefficients

Sal solves one-step multiplication equations with fractional coefficients. Created by Sal Khan.

## Want to join the conversation?

• why r some vids so long
• Maybe because you need to understand what it is.
• Math can be confusing and this is very hard Help meeee. This also makes 0 sense.
• another tip when multiplying fractions by fractions if there is an expression is to:
multiply d by d and n by n.
for fraction by fraction division you can do the first n divided by the second d and the second n by the first d then multiply the 2 fractions you got.
• How do you get 12/15 from 10.6= 12/15c/2?
I don't understand at all.
At Sal says,
"To get a variable do it".
How does that make any sense?
• Can someone else explain this to me shorter and easier to understand
• Basically, if you have a variable with a coefficient that is a fraction, such as 1/4x = 5, you can multiply both sides by the reciprocal of the coefficient to find what the variable is.

1/4 x 4/1 = 1
5 x 4/1= 20
x = 20

Hope this helped!
• ngl this was a really helpful video
• I tried calculating the first sum on my own and did a completely in a different way compared to the way Sal had explained and demonstrated it...And I checked if my answer was correct and it was so....What should I do? Should I keep doing it the way I did it or should I do it the way Sal had?
• Hi Ghost!
Hey, if your way works, why not continue? The important thing is you understand both ways, can do both, and get the right answer. I suggest doing Sal's way every now and then so you don't forget it.
Hope this helped! Have a nice day!!
• Why is there no comments 🤨
(1 vote)
• It is because this is a new video. Many people have not watched it yet.