Question

Please help, I'm seriously lost on this one!

Answer 1

error in line number 4 in the right hand side it will be 28x-4

Answer 2

@BrambleClaw

Answer 3

Well thanks, but can you tell me why that is? If you just leave me with that, then I won't understand how to do this sort of thing in the future, and then end up coming back here again :/

Answer 4

yeah because check line number 3
4(7x-1)=4(7x)+4(-1)=28x-4

Answer 5

@BrambleClaw

Answer 6

Distributive property of real number
a(b+c)=a*b+a*c

Answer 7

I hope you can proceed now.. @BrambleClaw

Answer 8

Ah I think I get it, so is it because 4(7x- 1) should turn out to be 28x - 4?

Answer 9

yeah correct..:)

Answer 10

Wow, I'm not sure how I didn't see that lol, thank you so much! And also lucky for you, I don't forget about medals :)

Answer 11

Ha ha ha..:)

Answer 12

Can I ask one more thing about this before I lose you?

Answer 13

Obviously

Answer 14

Heh, thanks.... So on line 2, where did 24 over 1 come from?

Answer 15

ok this is the cancellation law of real numbers
If a is not zero
Then ab=ac implies b=c
They just multiplied both sides by 24/1 which is not equal to 0 so the previous line is equal to this line

Answer 16

Huh... Okay then, I guess that makes sense, thanks!