A.x=1是不等式x<3的一个解
B.x=3是不等式x>1的解集
C.x>-2是不等式-2x>1的解集
D.不等式-x<1的解集是x<-1
第6题
A.[ 8000x12+2000x (1-20%) - 5000x12- 1500x12-400x12] x3%
B.[ 8000x12+2000x (1- 20%) x70% - 5000x12- 1500x12-400x12] x3%
C.[ 8000x12+ (2000- 800) - 5000x12- 1500x12- 400x12] x3%
D.[ 8000x12+ (2000- 800) x70% - 5000x12- 1500x12-400x12] x3%
第11题
A.2200X3%
B.(2200+198) x3%
C.2200x (1+3%) x3%
D.2200+ (1 +3%) x3%
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