Question

解方程组{2X-Y+Z=-3①,X+3Y-2Z=13②,3X-2Y-Z=2③

Answer 1

2X-Y+Z=-3 (1)

X+3Y-2Z=13 (2)

3X-2Y-Z=2 (3)

(1)*2+(2): 5X+Y=7 (4)

(1)+(3): 5X-3Y=-1 (5)

(4)-(5): 4Y=8

Y=2

5X+2=7

5X=5

X=1

3-4-Z=2

Z=-3

X=1, Y=2, Z=-3