Question

What value of b will give the solution of the system below an x-coordinate of 3?

Answer 1

2x-5y=16
2*3-5y=16
y=?

Answer 2

so do you want me to do the elimination method?

Answer 3

No

Answer 4

well then explain ? because throwing out an equation isnt helping me

Answer 5

Frm my equation
6-5y=16
-5y=16-6
-5y=10
y=?

Answer 6

okay you guys are really skipping ahead , I need something more step by step because I'm completely lost and neither of you are good at explaining . thanks tho

Answer 7

Can i try once more!!!

Answer 8

Now i wanna show u elimination method. It will b easier

Answer 9

ok

Answer 10

I made a mistake anyway

do you see if you add the 2 equations we get
2x + bx - 5y + 5y = 27?

Answer 11

2x-5y=16............(1)
bx+5y=11...........(2)

Answer 12

- this is the elimination method
- the 2 5y's disappear

Answer 13

U know
-5y+5y=?

Answer 14

Im just going to take a guess and move on ...

Answer 15

but I'll leave it to shamim - you might get confused having 2 people explain it

Answer 16

So we hv
2x+bx=27
Right?

Answer 17

you shouldn't guess - that's not the way to learn..

Answer 18

Just put x=3 in my last equation
2*3+b*3=27
6+b*3=27
3b=27-6
3b=21
b=?

Answer 19

7?

Answer 20

Correct!!!!!!!!

Answer 21

Thank you

Answer 22

Glad to help u!!!!!!!

Answer 23

Welcome!!!!!!!