Question

Solve the following system of equations
2x + 4y - 3z = -7
3x + y + 4z = -12
x + 3y + 4z = 4

a)-6,-2,-1
b)6,-2,-1
c)-6,2,1
d)6,2,1

Answer 1

I see. Three variable huh? This time you don't need to solve it.
Just substitute the values ;)

Answer 2

\( \color{Black}{\Rightarrow 3(-6) + (-2) + 4(-1) = -12?}\)

Answer 3

Similar for all the other options.

Answer 4

sorry i still dont get? is it either a,b,c, or d??

Answer 5

B

Answer 6

thank you

Answer 7

hi friend right answer is C. i did this myself. Please give me medal if you like.