Question

solve the system using elimination

6q - r + 2s = 8
2q + 3r - 5 = -9
4q + 2r + 5s = 1

Steps would be appreciated u w u

Answer 1

1) Fix the second equation.
2) Pick a variable and solve for it in any one equation.
3) Substitute for the variable the solved-for expression in the other equations.
4) Repeat 2) and 3) as necessary.

That's about it.

Answer 2

Ok, I'm really, really lost... How would I complete those steps? Sorry :/

Answer 3

You must do #1. No one can help you with that.

Answer 4

Real helpful, dude. My problem is that I've no idea how to do number one.

Answer 5

he has to do it by elimination, not substitution tkhunny

Answer 6

Or any of the problems for that matter :/

Answer 7

Seriously? You can't fix the equation that is written incorrectly?

Answer 8

I don't know what's wrong with it!!!!

Answer 9

Oh, right. Misread that. Anyway, you still have to do #1.

Answer 10

you forgot the s

Answer 11

The "s" might be missing.

Answer 12

is equation 2 supposed to be : 2q - 3r - 5s = -9 ??

Answer 13

Yeah. Sorry, I copied it incorrectly.

Answer 14

There you go. So we see that you can do step #1. Now, listen to Texas.

Answer 15

1) 6q - r + 2s = 8
2) 2q + 3r - 5s = -9
3) 4q + 2r + 5s = 1

The idea is to ELIMINATE things. It's kind of magic. I numbered the equations for simplicity of communication.

Calculate 1) - 3*2)
Calculate 3) - 2*2)

It will be fun!