Question

help?!?!

Answer 1

e=equation
e1+e2=e4
e2+e3=e5
e4+e5= one variable.

Answer 2

a+b+c=-3
3b-c= 4
2a-b-2c=-5
So....
a+b+c=-3
3b-c= 4 c+(-c)=0
a + 4b = 1
Then.....
(0a+3b-c= 4) multiply whole equation by -2
0a-6b+2c=-8
2a - b -2c=-5
2a -7b=-13
Now....
(a + 4b = 1) multiply whole equation by -2
-2a-8b=-2
2a -7b=-13
-15b=-15
b=1
Now find a and c by plugging b into one of these two equations
-2a-8b=-2
2a -7b=-13
I'm going to use
-2a-8(1)=-2
-2a-8=-2
-2a=6
a=-3
Now pick one of the original equations I'm going to use
(-3)+(1)+c=-3
-2+c=-3
c=-1

Answer 3

Understand what I did?

Answer 4

USE THE MATRIX! sorry caps but ummm it sounded cool like the MAtrix

Answer 5

I love using matrices to solve these. But I wasn't sure if she knows how to do that yet?

Answer 6

@RoseDryer yes i understood what you did i i think i understand now. :)

Answer 7

Well if you get stuck on any post the question and what you did and I'll help you out.

Answer 8

okAY thankyou ! :D