Question

NO IDEA HOW TO SOLVE THIS....

Solve the following system of equations. 2a - 3b + c = 102a - 2b - 2c = 2a + 3b + 2c = -1

(2, 3, 4)

(-1, 2, 3)

(1, -2, 2)

(3, -1, 0)

Answer 1

Three equations in three variables:
2a - 3b + c = 102
a - 2b - 2c = 2
a + 3b + 2c = -1
is this the correct system of equations?

Answer 2

yes sir

Answer 3

same question,

Answer 4

what?

Answer 5

ok, if you add all the equations, you get

Answer 6

4a - 2b + c = 103

Answer 7

use substitution method to find what c is

Answer 8

Ok, you need to take two equations and add them together or subtract and eliminate one variable. Then take another 2 equations and eliminate the same variable.
Let's eliminate c.
First add eq 2 and eq 3:
2a + b = 1 here's a new eq with no c

Answer 9

Now if you add eq 1 and eq 2, c will not eliminate, so first multiply the entire eq 1 by 2:
4a - 6b + 2c = 204 and add to eq 2
a - 2b - 2c = 2
---------------------
5a - 8b = 206

Answer 10

The answer isn't C ;)

Answer 11

This is another eq without c.
Now solve the two equations without c as a system of 2 equations in two variables

Answer 12

Ok

Answer 13

-1, 2, 3

Answer 14

I think the system of eqs is incorrect. Your question doesn't have spaces between the equations. I think I wrote the 2nd and 3rd equations wrong.

Answer 15

Don't worry, you're still smart as h***

Answer 16

I figured out what the correct problem was. I wrote it out and scanned it. See pdf above.

Answer 17

youre the BEST

Answer 18

thanks

Answer 19

no thank you, really.