Reducing to Row Echelon Form Perform the indicated operations:
[4 -1 -4 | -7]
[0 5 -2 | -11]
[0 8 10 | 22]

-8R2 ->R2
>
5R3 ->R3

[4 -1 -4 | -7]
[0 a b | 88]
[0 c d | 110]

a=?
b=?
c=?
d=?​

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.