Tim X
3) -12 + (2x – 9) + x= 0
4) 11 + (15 - x) = 1
5) 4 - (27 - 3) = x - (13 - 4)
6) 8 - (x - 10) = 23 - (- 4 +12)
7) 105 – 5(10 – 5x) = -20
8) (x -1)(8-2x)(3x+123) = 0
9) (x2 - 25)(x+ 10) = 0
10) x(x2+5) =
Bài 1: Tìm x [GIÚPPPPPPPPPPPPPPPPPPP]
1) 5 – (10 – x) = 7
2) - 32 - (x – 5) = 0
3) -12 + (2x – 9) + x= 0
4) 11 + (15 - x) = 1
5) 4 - (27 - 3) = x - (13 - 4)
6) 8 - (x - 10) = 23 - (- 4 +12)
7) 105 – 5(10 – 5x) = -20
8) (x -1)(8-2x)(3x+123) = 0
9) (x2 - 25)(x+ 10) = 0
10) x(x2+5) = 0
1.tìm x,y thuộc z
a)(x-3+3)(8x-x+3)=12
b)(x+65-45)(678-654+2x)=23
1> 234 + (345 - x ) =500
2> 456 -( x + 23 ) =326
3> ( 567 - x ) x 212 = 605
4> ( 5 x X - 15 ) :5 = 0
5> 14 x ( x - 7 ) = 210
6> 84 -4 x ( 2 x X +1 )= 48
tim x
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tính nhanh
1. 2/3 + 4/9 + 1/5 + 2/15 +3/2 - 17/18
2. 13/28 x 5/12 - 5/28 x 1/12
3. 19/4 x 15/23 - 15/4 x 7/23 + 15/4 x 11/23
Tim x
a, ( - 14 - x ) + 13 = 5
b, ( 11 + x ) - ( - 11 - 9 ) = 32
c, 5 - ( x - 8 ) + ( - 21 ) = 42
d, - [ 4 - 15 ] - ( - 4 - x = - 45
e, - 23 - ( 10 - x ) = - 50
Bai 1 Tim x biet
a)162+(15-x0=125
b)x^3*x^2=2^7/4
c)5(x+27)=200
d)x-3=6-(19-23)
e)(x+32)-145=92
f) 2*3^x=162
g)9x-9=3^2/3
h)162-(15+x)=148
Bai 2 Thuc hien phep tinh
a)12+14+16+18+...+86+88
b)217+[43+(-217)+(-23)]
c) (-345)+[(-724)+345+224]
d)2^3*3-(12-36)
tim so tu nhen x
128-3(x + 4 ) = 23
( 6x -33 ) x 53= 3x54
2448:[119-(x-6) ] =24
130-[ 5 x (9-x) + 43 ] =47
x-2 la Ư(30) , x-2 la Ư(15) va x la so nguyen to
(x-15)-(x-3)=-(x+17)-1
-(x-12)-(x-5)=-(4-x)+13
34-(x-7)=x+15-(x+23)
