Question

Use the substitution method to solve the following system of equations.
4x - y - 3z = -3
x - 2y - 2z = -3
x + y + 3z = -2

Answer 1

solve 2 eqns at once

Answer 2

I don't understand how to do that..

Answer 3

i mean solve the first two eqns to eliminate one variable

Answer 4

set up a 3x3 matrix and use Gaussian Elimination with backward sustitution

Answer 5

x=-13/4
y=16/7
z=-1