(31/20.26/45). -36/35<x<(51/56+8/21+1/3).8/13 Cho lời giải thích giúp mink vs nha
2 câu trả lời
31/20 × 26/45
= 31 × 26 / 20 × 45
= 806/900 = 403/450
= 0.89
-36/35 < x < ( 51/56 + 8/21 + 1/3 ) × 8/13
= -36/35 < x < ( 153/168 + 64/168 + 56/168 ) × 8/13
= -36/35 < x < 13/8 × 8/13
= -36/35 < x < 13 × 8 / 8 × 13
= -36/35 < x < 1
→x = 0
Vậy x = 0
