Question

x+y-5z=-5
y-2z=14
4y-2z=8

Answer 1

find the X,Y,Z

Answer 2

do u want to solve it by elimination?

Answer 3

yes

Answer 4

multiply second equation by -1 then add it to third equation

Answer 5

i dont think i did it correct @mukushla

Answer 6

@saifoo.khan can you help ?

Answer 7

Which method you know good? Elimination or substitution? @sharee2012

Answer 8

substitution i think

Answer 9

x+y-5z=-5
y-2z=14
4y-2z=8

taking equation 2.
solving for y.

y -2z = 14
y = 14 + 2z

Now use this value and insert it in equation 3 let's say. then you will get the value of z.

4y-2z=8
y(14+2z) -2z = 8

Solve..

Answer 10

14?

Answer 11

Typo in the last line:

4*(14+2z) -2z = 8

Answer 12

y(14+2*3)-2*3=14

Answer 13

Solve this:

4*(14+2z) -2z = 8

Answer 14

74?

Answer 15

im getting z = -8