Trang chủ » Hỏi đáp » Môn Toán Tìm x a .5 4/7 : x =13 b. 2x : (1/5 – 2/5)=4 3/8 c. x/17 -9/34 = 1 2/5 17/11/2023 Tìm x a .5 4/7 : x =13 b. 2x : (1/5 – 2/5)=4 3/8 c. x/17 -9/34 = 1 2/5
a, 5 4/7 : x= 13 39/7 : x= 13 x = 39/7 : 13 x= 3/7 Vậy x = 3/7 — b, 2x :(1/5 – 2/5 ) = 4 3/8 2x : (-1/5) = 35/8 2x = 35/8 xx (-1/5) 2x = -7/8 x =-7/8 : 2 x = – 7/16 Vậy x = -7/16 — x/17 – 9/34 = 1 2/5 x/17 = 7/5 + 9/34 x/17 = 283/170 (10x)/(170) = 283/170 => 10x = 283 x = 28,3 Vậy x = 28,3 Trả lời
Giải đáp: a) 5\frac{4}{7}:x=13 =>39/7 : x=13 =>x=39/7:13 =>x=39/7 . 1/13 =>x=\frac{3.13.1}{7.13} =>x=3/7 Vậy x=3/7 b) 2x:(1/5-2/5)=4 3/8 =>2x:(-1/5)=35/8 => 2x=35/8 .(-1/5) =>2x=7/8 =>x=(-7/8):2 =>x=-7/16 Vậy x=-7/16 c) x/17 – 9/34=1 2/5 =>x/17-9/34=7/5 =>x/17=7/5+9/34 =>x/17=283/170 =>x.170=17.283 =>x.170=4811 =>x=283/10 Vậy x=283/10 Trả lời
