Câu 5 128x Y – 12 x Y – 16x Y= 145700 B ( 200-58) x 58 + (100+42) x42 C 5 x X + 3.75x X+1.25 x X= 34.5 ( giúp đi)

2 bình luận về “Câu 5 128x Y – 12 x Y – 16x Y= 145700 B ( 200-58) x 58 + (100+42) x42 C 5 x X + 3.75x X+1.25 x X= 34.5 ( giúp đi)”

1. a, 128Y – 12Y – 16Y = 145700
   <=> 100Y = 145700
   <=> Y = 145700/100 = 1457
   b, (200 – 58) x 58 + (100 + 42) x 42 
   = 142 x 58 + 142 x 42
   = 142 x (58 + 42)
   = 142 x 100
   = 14200
   c, 5X + 3,75X + 1,25X = 34,5
   <=> (5 + 3,75 + 1,25)X = 34,5
   <=> 10X = 34,5
   <=> X = 34,5/10 = 3,45
   xin 5sao + ctlhn <3

   Trả lời
2. 128xY – 12xY – 16xY = 145700

   Yx(128-12-16)=145700

   Yx100=145700

   Y=145700:100

   Y=1457

   Trả lời