Therefore, by eliminating z and y respectively, we get: Y = 35- 1.5x, Z = 25+0.5x

2。 The total profit is 0.3x+0.5y+0.2z.

= 0.3x+0.5(35- 1.5x)+0.2(25+0.5x)

= 22.5-0.35 times

19 & lt； = 22.5-0.35 x & lt； = 19.7

So 8

X=8 or 10 because x, y, z, y and z are all integers.

X=8, y=23, z=29, the number of people is 40,92,58, and the profit is 19.7.

X= 10, y=20, z=30, 50,80,60 people, and profit 19.

Why not choose the most profitable one? This shopping center is so strange.