Answer: 64
Step-by-step explanation:
Answer:
x - y + z = 8
2x +3y -z= -2
3x - 2y -9z = 9
[1 - 1 1 8]
[2 3 -1 -2]
[3 -2 -9 9]
always start at the origin and X go before Y
x - 3x = 2(4 + x)
-2x = 8 + 2x
-4x = 8
x = -2
5x +4 =8x - 71
-3x +4 = -71
-3x= -75
x= 25
40%
