y=5000+[120000-3000-5000{x-2}]*0.04

问题描述:

y=5000+[120000-3000-5000{x-2}]*0.04

y=5000+[120000-3000-5000{x-2}]*0.04
y=5000+[120000-3000-5000x+10000]*0.04
y=5000+[-5000x+127000]*0.04
y=5000-200x+5080
y=-200x+10080