1.解:
(1)8x一5≥x+16.移項(xiàng),合并同類項(xiàng),得7x≥21.兩邊同時(shí)除以7,得x≥3.
(2)6x+1≤2x-3.移項(xiàng),合并同類項(xiàng),得4x≤-4兩邊同時(shí)除以4,得≤-1.
(3)3(x-3)<x-15.去括號(hào),得3x-9<x-15.移項(xiàng),合并同類項(xiàng),得2x<-6.兩邊同時(shí)除以2,得x<-3
(4)(x-1)/2<(7x+2)/5 .去分母,得5(x-1)<2(7x+2).去括號(hào),得5x-5<14x+4.移項(xiàng),合并同類項(xiàng),得-9x<9兩邊同時(shí)除以-9,得x>-1.
(5)2(x+3)-4x>-(x-3).去括號(hào),得2x+6-4x>-x+3.移項(xiàng),合并同類項(xiàng),得-x>-3,兩邊同時(shí)除以-1,得x<3.
(6)1/2 (2-x)>1/4(3-x)+1/4 .去分母,得2(2-x)>3-x+1.去括號(hào),得4-2x>3-x+1.移項(xiàng),合并同類項(xiàng),得-x>0
兩邊同時(shí)除以-1,得x<0.
2解:(1)解不等式得x≤1,所以最大整數(shù)解為1.
(2)解不等式得x<31/3,所以最大整數(shù)解為3.
3.解:(1)解不等式得x≥-4,所以最小整數(shù)解為-4.
(2)解不等式得x>-3,所以最小整數(shù)解為-2
6.解:設(shè)這家商店銷售x件襯衫,銷售收入才能超過總成本,則95x>  |