Main content

## 6th grade

### Course: 6th grade > Unit 6

Lesson 8: Writing algebraic expressions introduction- Writing basic expressions with variables
- Writing algebraic subtraction expressions
- Writing basic expressions with variables
- Writing basic expressions with variables
- Writing expressions with variables
- Writing expressions with parentheses
- Writing expressions with variables & parentheses
- Writing expressions with variables
- Writing expressions with variables

© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

# Writing expressions with variables

Learn to write expressions for more challenging phrases like "8 less than the product of 7 and x."

## Now, let's practice!

## Want to join the conversation?

- Why would adding and multiplying variables be helpful in every day life(46 votes)
- If you're short on money, walking around a grocery store, you sometimes have to add the food items together and multiplying the sum with the sales tax to see if you can afford them all.(32 votes)

- How do you know what part to put first or last? It isn't specified.(17 votes)
- You may put it in any order, but I would recommend that you write the expression with whatever comes first.

What I mean by that is this:

Suppose you have to write an expression from this description:*six added to the product of 4 and y*

You can write it like this:

4y + 6

Or like this:

6 + 4y

Unless it is subtraction, you can write it in any order you choose. I like how the first answer sounds, but I would prefer the second answer because it is in the order that the question is written in, to double-check my work. But yes, you can do it any way you wish.(12 votes)

- what does it mean by eight less?(8 votes)
- Eight less than a number means 8 subtracted from the number. So 8 less than x means x-8 (but not 8-x).(9 votes)

- What if you get confused in the negative sign and the subtraction sign?(9 votes)
- If you regularly get confused, consider using brackets or parentheses to separate them.(3 votes)

- is math boring if it is up vote if it is not down vote(9 votes)
- tbh, i am like 100% not a math person, so, ya, its boring.(1 vote)

- I also agree with him but we do have hints still if needed sometimes if we are stuck.(9 votes)
- How do you do it it’s very hard😩(6 votes)
- what are you confused on? What part of the math?(4 votes)

- You would do if it says 8 less than 10 then put it at the end like 10+8 or 6 more than 7 then 7+6(8 votes)
- Q1: Write an expression that means "eight less than the product of seven and x".

can it not be written as 8-7x

?(2 votes)- Well, If you want 8 less than 7x, you take away 8 FROM 7x. The reason because if you want to take away 1 from 10, you would do 10-1 not 1-10.

If you get what I mean.(0 votes)

- i dont home school lol im just saying dont take it personally(4 votes)