A) (-2).3+(-4)-7.0+1
b) 21.35-3.25.7
c)77-11.(30+7)
d) 85.(35-27)-35.(85-27)
Bai 3
b) 14-5x=(-16)+15
c)-3.(x+14)-15=21
d) 4.x-15=-75-x
Bai 4 : Tim gia tri lon nhat cua bieu thuc:B=1999-|x-2| voi x thuoc z
Cam on cac b
Loga
Sinh Học lớp 12
