Question

2x + y -3z=-5
x - 3y+4z = 5
3x + 2y-5z = -8
Using the process of elimination how do I solve once I combine 2 of the equations?

Answer 1

can we use row-equivalent method or by usin cramer's rule??it's easierthat way!

Answer 2

Multiply second equation by 2 and subtract the first to get rid of x.

Then multiply the second by 3 and subtract the third to get a second equation in y and z.

U will then have simultaneous equations to solve which is straightforward.

Finally sub back for x.