You are Here: Home >< Maths

# Stuck with Math question Watch

1. Solve 7(k-3)=3k-5

Thanks
2. (Original post by EleanorS14)
Solve 7(k-3)=3k-5

Thanks
What have you tried?

Try expanding the LHS first:

So we have

Now put all the k's one one side and all the constants on the other.
3. Thanks
Would it be like this 7-21 = 3 - 5
-14=-2
(Sorry I'm really bad at maths.)
4. (Original post by Zacken)
What have you tried?

Try expanding the LHS first:

So we have

Now put all the k's one one side and all the constants on the other.
Thanks Zacken;64488879
Would it be like this 7-21 = 3 - 5
-14=-2
(Sorry I'm really bad at maths.)
5. (Original post by EleanorS14)
Solve 7(k-3)=3k-5

Thanks
Um, first expand the brackets

7k-21= 3k-5

Then collect the like terms together

7k-3k=-5+21

Then simplify
4k=16
k=16/4
k=4

hope it helps
6. (Original post by rohit301099)
Um, first expand the brackets

7k-21= 3k-5

Then collect the like terms together

7k-3k=-5+21

Then simplify
4k=16
k=16/4
k=4

hope it helps
Thankyou.I understand now.
7. (Original post by EleanorS14)
Thankyou.I understand now.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: May 2, 2016
Today on TSR

### Medicine offers rolling in

Which unis have sent theirs?

### I hate Christmas

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.