a: =>5x+25-3x+6=25+18
=>2x+41=43
=>2x=2
=>x=1
b: =>4x+8=3x+3+17
=>4x+8=3x+20
=>x=12
a: =>5x+25-3x+6=25+18
=>2x+41=43
=>2x=2
=>x=1
b: =>4x+8=3x+3+17
=>4x+8=3x+20
=>x=12
1, (2+4+6+...+100)
2, 10-(3-x)=-10+17
3, 17-(3+x)=2-(7-8)
4, (5+x)-(15-31)=-20
5, 17-(3+x)+15-3=2
6, (41-x)-(13-17)=40-50
7, -(52-x)+(40-42)=-57+13
Bài 8. Tìm số nguyên x
1) x – 12 = (-8) + (-17) 2) (7 – x) – 5 = - 13 3) 7 – 3x = 28 4) 2(x + 1) + 18 = - 4 | 5) 37 – x = 12 6) x + 5 = -18 7) 27 – (x + 1) = 2. (52 – 24) 8) (x – 3)(x + 3) = 0
|
B3 :
a, 2/3 + 1/5 x 10/7
b, 7/12 - 27/7 x 1/18
c, (23/11 - 15/82) x 41/25
d, (4/5 + 1/2) (3/13-8/13)
giúp em vs ạa
a x e x
b x f x
c x x
2
3
2 1 1 1 17 26
3 2 10 5 25 25
4 2 5 7 24
2 50 51 1 3
5 3 27 9 27
1 2
2 0
2 3 ) :
) ) ,
g x
d x h x x
3 1
1 4
7 28
17 3 7 2 7
2 0 5
2 4 4 3 12
tim x :
a) (3x - 4) . (x- 1)3 = 0
b) x17 = x
c) 22x - 1 : 4 = 83
d) (x + 2)5 = 210
e) (X - 5)4 = (X - 5)6
f) 1+2+3+.......+x =78
g) (x +1)2 =(x +1)0
h) (2 + x) + (4 +x) + ( 6 +x) +.......+(52 + x)= 780
Tìm x
Trả lời nhanh giúp mình nha, mnh đang rất vội, cảm ơn.
1. Tìm x:
a) 2x - 6 = 3(x + 5) + 25 + 27 - 15 - 17
b) |x - 5| - 7(x + 4) = 5 - 7x
c) 3|x - 4| - 2(x + 1) = 7 - 2x
Nhanh nha. Mai nộp rùi!!!
Làm đc câu nào thì lm giúp mk vs.
giúp mình vs
2/5 + 3/4 - 1/2
( - 13/31 : 5/17 + -18/31 : 5/17 ) . 25/34
7/9 - 5/9 : x = 1/6
Tìm x thuộc Z
A, 3 - (17-x)=-24+12
B, -5+(16-x)=22.3-52
C, -26-(x-7)=34-92
D, -36-(4-x)=37+(-5)
Giúp mình vs mình tick @@
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)
