tìm x 1, 1/6 * x – 3/8 = 1/4 2, 1/3 + 2/3 : x = -7 3, 2/3 * x +1/4 = 7/12 4, 3/4 + 1/4 : x = -3 05/09/2021 Bởi Maria tìm x 1, 1/6 * x – 3/8 = 1/4 2, 1/3 + 2/3 : x = -7 3, 2/3 * x +1/4 = 7/12 4, 3/4 + 1/4 : x = -3
1. 2. 1/6 x X – 3/8 = 1/4 1/3 + 2/3 : X = -7 1/6 x X =1/4+3/8 2/3 : X =-7 – 1/3 1/6 x X = 5/8 2/3 : X =-22/3 X=5/8 : 1/6 X=2/3 : -22/3 X=15/4 X=-1/11 Vậy… Vậy… 3. 4. 2/3 x X + 1/4 = 7/12 3/4 + 1/4 : x= -3 2/3 x X =7/12 – 1/4 1/4 : x=-3 : 3/4 2/3 x X =1/3 1/4 : x=-4 X=1/3 : 2/3 X=1/4 : -4 X=1/2 X=-1/16 Vậy… Vậy… Bình luận
Đáp án: Giải thích các bước giải: 1) 1/6x=1/4+3/8 <=> 1/6x=5/8 x=15/4 2) 1/3+2/3:x=-7 <=> 2/3:x=-7-1/3 <=> 2/3:x=-22/3 => x=2/3:(-22/3) =>x=-1/11 3) 2/3x+1/4=7/12 <=> 2/3x=7/12-1/4 <=> 2/3x=1/3 => x=1/3:2/3 => x=1/2 4) 3/4+1/4:x=-3 => 1/4:x=-3-3/4 => 1/4:x=-15/4 => x=1/4:(-15/4) => x=-1/15 Bình luận
1. 2.
1/6 x X – 3/8 = 1/4 1/3 + 2/3 : X = -7
1/6 x X =1/4+3/8 2/3 : X =-7 – 1/3
1/6 x X = 5/8 2/3 : X =-22/3
X=5/8 : 1/6 X=2/3 : -22/3
X=15/4 X=-1/11
Vậy… Vậy…
3. 4.
2/3 x X + 1/4 = 7/12 3/4 + 1/4 : x= -3
2/3 x X =7/12 – 1/4 1/4 : x=-3 : 3/4
2/3 x X =1/3 1/4 : x=-4
X=1/3 : 2/3 X=1/4 : -4
X=1/2 X=-1/16
Vậy… Vậy…
Đáp án:
Giải thích các bước giải:
1)
1/6x=1/4+3/8
<=> 1/6x=5/8
x=15/4
2)
1/3+2/3:x=-7
<=> 2/3:x=-7-1/3
<=> 2/3:x=-22/3
=> x=2/3:(-22/3)
=>x=-1/11
3)
2/3x+1/4=7/12
<=> 2/3x=7/12-1/4
<=> 2/3x=1/3
=> x=1/3:2/3
=> x=1/2
4) 3/4+1/4:x=-3
=> 1/4:x=-3-3/4
=> 1/4:x=-15/4
=> x=1/4:(-15/4)
=> x=-1/15