1260:(y:35)=105
y:35=1260:105
y:35=12
y=12x35
y=420
(450+yx15):y-25=15
(450+yx15):y=15+25
(450+yx15):y=40
450+yx15=40xy
450=40xy-15xy
450=yx(40-15)
450=yx25
y=450:25
y=18
Đúng 0
Bình luận (0)