Question

Solve the following system of linear equations giving the solution
as a coordinate pair in the form (x,y):
y = 7x + 7
y = 8x - 3

Answer 1

Can you tell me when you get the answer please, i just need to verify what i am doing wrong
Thank you

Answer 2

as they both have y = then we can equate the right hand sides
so

7x + 7 = 8x - 3

Answer 3

this is simple to solve
first subtract 7x from both sides
then add 3 to both sides

and you'll get some value = x

Answer 4

ill do the first part

7x + 7 - 7x = 8x - 7x - 3
7 = x - 3

x = ?

Answer 5

I dont understand your process?
Do you want me to do
7x + 7 + 3x=8x- 7x -3 + 3?
Is this what you want me to do?

Answer 6

No all you have to d is add 3 to both sides of
7 = x - 3

this will isolate x on right and give its value on left

Answer 7

- weve done the -7x bit
the next step is the +3.

Answer 8

u still there?

Answer 9

Yeah sorry

Answer 10

So what was the answer?

Answer 11

7 + 3 = x - 3 + 3

the rHS = x what is LHS?

Answer 12

Im sorry i dont even know what that is lol

Answer 13

I just wanted to solve this quick problem because of something i was calculating

Answer 14

the reason we add 3 to both sides is because theres -3 on RHS and adding 3 will isolate x.

Answer 15

surely you can work out what 7 + 3 is?

Answer 16

ofcourse

Answer 17

well there you go - thats the value of x.

Answer 18

So then how would you write the answer as?
Because i dont know where your going with this?

Answer 19

What do you want to do with 10?

Answer 20

Because remember there asking to solve it in (X,y) terms

Answer 21

we have found x so now to find y
plug the value of x into y = 7x + 7 and work it out

Answer 22

Oh, i see

Answer 23

y = 7(10) + 7

Answer 24

the answer will be written as (10,y) where y is the result of the above

Answer 25

So is it written as (10,77)?

Answer 26

yea

Answer 27

oh

Answer 28

Ok

Answer 29

x value always comes first

Answer 30

Thank you, and before you go can i ask you something really quick?