Question

solve by elimination
1. x-y+3z=8
2.3x+2y+=5
3.4x+y+6z=11

Answer 1

look at number 2 ... is that correct ?

Answer 2

i mean have u typed it rightly?

Answer 3

3x+2y\( \color{red}{+} \)=5

Answer 4

3x+2y+5z=5

Answer 5

well i solved it...first look at these:

x-y+3z=8
4x+y+6z=11

so we can write: 5x + 9z = 19 \(\Large \color{red}{ (1)} \)

Answer 6

and now look at these two equations too:

3x+2y+5z=5
4x+y+6z=11

so we can write the second one in this way:
-8x - 2y - 12z = -22 and we had 3x+2y+5z = 5 too so it would be:

-5x -7z = -17 \( \Large \color{red}{(2)} \)

Answer 7

and can u find x and z from the equations 1 and 2 ?

Answer 8

that explanation made sense ?

Answer 9

yes thank you @PFEH.1999

Answer 10

you're welcome ;)