0.8*50x>0.7*50(x+4) 0.8*5 - 知识问答

0.8*50x>0.7*50(x+4) 0.8*50x=0.7*50(x+4) 0.8*50x

1个回答

0.8*50x>0.7*50(x+4)
40x>35(x+4)
40x>35x+140
5x>140
x>28
0.8*50x=0.7*50(x+4)
40x=35(x+4)
40x=35x+140
5x=140
x=28
0.8*50x

相关问题