Solve the given sytem of equations

9x+12y+2z=23

21x+2y-5z=-25

-18x+6y-4z=-11

Solve the given system of equations by use of determinants

26L-52M-52N=39

45L+96M+40N=-80

55L+62M-11N=-48

Solve the given system of equation by determinants

6541x+4397y=-7732

3309x-8755y=7622

Solve the given system of equations by either by either substitution or elimination

0.66x+0.66y=-0.77

0.33x+1.32y=1.43