Question

I keep getting no solution could I have some help please...

Solve the following system of equations.

3x + 3y + 2z = –5
x + y + 3z = –4
2x + 2y + 5z = –7

Answer 1

x = -4 - y - 3z

^substitute to one of the equations

2(-4 - y - 3z) + 2y + 5z = -7

-8 - 2y -6z + 2y + 5z = - 7

-8 - z = -7

z = -8 + 7

z = -1

can you do the rest?

Answer 2

honestly no I cannot

Answer 3

let's use x = -4 - y - 3z again

now sub -1

x = -4 - y -3(-1)

x = -4 - y + 3

x = -1 - y

got it?

Answer 4

well why don't you use cramer's rule

Answer 5

yes thank you very much I understand it now. I really appreciate your help.

Answer 6

great :D