帮忙解一道计算题
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帮忙解一道计算题
帮忙解一道计算题
帮忙解一道计算题
P=1200x+1600y+1300(60-x-y)-61000-1500
=1200x+1600y+78000-1300x-1300y-62500
=-100x+300y+15500
将y=2x-5代入上式得:
P=-100x+300(2x-5)+15500
=-100x+600x-1500+15500
=500x+14000
所以P与x的函数关系是P=500x+14000
P=1200x+1600y+1300(60-x-y)-61000-1500
=1200x+1600y+48000-1300x-1300y-62500
=-100x+300y-14500.
把y=2x-5代入上式,得
P=-100x+300(2x-5)-14500
=-100x+600x-1500-14500
=500x-16000.
故P与x的函数关系是:
P=500x-16000.