a) -3/7 x X + 1 = 1/11
=> -3/7 x X = 1/11 - 1
-3/7 x X = -10/11
=> x = -10/11 : (-3/7)
x = 70/33
b) 1/4 + 1/3 : (2x - 1) = -5
=> 1/3 : (2x - 1) = -5 - 1/4
1/3 : (2x - 1) = -19/4
=> 2x - 1 = 1/3 : ( -19/4)
2x -1 = -4/57
=> 2x = -4/57 + 1
2x = 53/57
=> x = 53/57 : 2
x = 53/114
Tìm x biết:a) 10/x = -15/9; b) x/9 = -11/5 : 0,6; c) -7/8 - 2x = -3/4; d) (x-1/2):1/3+5/7=9và5/7; e)1/15.x+4/5.x=5và1/5; f) -1/3<x/6<1/2(x thuộc Z); h) 3/5+2/5:x=-1/4;i) 4 và 3/4x - 3 và 1/2=5/4; k)9/4.(1/3x-1/2)=4và1/2
a, 2/9 - 7/9 x X = 1/3
b, 4/5 + 5/7 : X = 1/6
c,1/3 + 3/8 - 7/12
d, 3/14 + 5/8 - 1/2
e,1/4 - 2/3 - 11/8
g,1/4 + 5/12 - 1/13 - 7/8
giúp mình với mình cần gấp
Bài 1. Tìm x,y ϵ Z biết:
a) xy - 2x - y = 1
b) y ( x - 1 ) - x = 8
c) xy - 3x + 2y = 11
d) 2/50 + 2/48 + 2/154 + ... + 2/x(x+3) = 202/1540
e) ( 1/ 1 . 2 . 3 . 4 + 1/ 2 . 3 . 4 . 5 + 1/ 3 . 4 . 5 . 6 + ... + 1/ 7 . 8 . 9 . 10 ) . x = 119/720
Trình bày đầy đủ nhé =)))))
tìm x
a) 4/5.x=4/7
b) x:8/11=11/3
c) 4/5+5/7:x=1/6
d) 2/9-7/8.x=1/3
1.thực hiện phép tính:
a,5/13 + -5/7 + -20/41 + 8/13 + -21/41
b,-5/7 . 2/11 + -5/7 . 9/11 +1
c, (4/5 + 1/2) . (3/13 - 8/13)
2. a, x + 4/7=7/11
b, -5/6 - x = 7/12 + -1/3
c,x - 1/4 = 5/8 . 2/3
d,x/126 = -5/9 . 4/7
giúp mik vs mn ơi, mik đnag cần rất gấp
Bài 1:
1)-7/9x2 3/4
2)2/3+1/3x-2/5
3) 3/4 x 15 1/3 - 3/4 x 43 1/3
4) (-49,1)x 13/27 - 58,9 x 13/27
5) 0,375 : (-4,5)
6) 3 1/7 :( -1 3/7)
7) 9 1/3 :4 2/3 - 2
8) ( 7 3/4 : 0,3125 + 4,5 x2 2/45) : (-8,5)
Bài 2
A= (-6/11) x 7/10 x (11/-6) x(-20)
B= (-1/9) x (-17/29) x 58/51
C=(-3/7) x 5/11 +(-5/14)x5/11
D=(1 1/27 x 12/23 x 9/14 ) :(-3/23)
Bài 3 tìm x
a) 3/7x -2/5 x+-17/33
b)(3/4 x - 9/16).(1/3 +-3/5 : x)=0
c)(x+3/5 ) . (x+1)<0
(Hạn thứ 3 nha , giúp mk vs)
Tìm x biet:
a,5/2x+x=32/15
b,x-7/2x=-32/15
c,-7/3x-7/4x+11/3=18/5
d,-5/6-3x=2/3
e,2x-5/9=-2/3
f,1/2-2/3x=7/12
g,7-|2x-3|=4
h,(19x+2.5^2):14=(13-8)^2-4^2
i,3/4x-2/3=2/7.1/6+5/7.1/6
k,(x+1/2).(2/3-2x)=0
l,x/2013-1/10-1/15-1/21-........-1/120=5/8
Tìm x:
a) x + 30% x = -1,31
b) ( x - 1/2 ) : 1/3 + 5/7 = 9 5/7 (hỗn số)
c) 1/2x - 3/4 = 14/9 . 3/7
d) -5/6 - x = 7/12 + -1/3
e) x + 3/ -15 = 1/3
f) (4,5 - 2x) .( -1 4/7(hỗn số)) = 11/14
BẠN NÀO GIÚP MK MK SẼ TICK
Bài 1 : thực hiên jpheps tính :
A=8/7+4/7.-6/11-4/11.5/11
B= 1/5:1/10-1/3.[6/5-(2-1/2)^2] + (-1/2)^3
Bài 2 :
a) 3/4 +1/4 : x =-3
(x-1/3)^2+5/9 =1