(x-105):25=15
x-105 =15.25
x-105 =375
x =375+105
x =480
\(\Leftrightarrow x-105=375\)
hay x=480
(x - 105) : 25 = 15
x - 105 = 15 . 25
x - 105 = 375
x = 375 + 105
x = 480
(x-105):25=15
x-105 =15.25
x-105 =375
x =375+105
x =480
\(\Leftrightarrow x-105=375\)
hay x=480
(x - 105) : 25 = 15
x - 105 = 15 . 25
x - 105 = 375
x = 375 + 105
x = 480
|-105| - |-25| + |15| - |5|
53.(-7)+47.(-7)+14.(-25)-4.(-25)
49 (6x-12 ) = 0
17 (15x- 45) = 0
105 (17x-34 ) =0
57 (9x-27) = 0
25+(15 - x) = 30
3 (x+7)- 15 =27
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
(x – 15 ) – 75 = 0 b) 575- (6x +70) =445
c) x –105 : 21 =15 d) (x - 105) :21 = 15
[x cộng 32 ] - 17 .2 = 42
575- [6x cộng 70 ] =25
315 cộng [ 125 -x] = 435
[x -105] chia 21 = 15
[ 61 cộng [ 51 -x ] . 17 = 1785
A. 28 x ( 29 - 23 ) - 29 x ( 28 - 23 )
B. 15 x ( 16 - 222 ) - 16 x ( 15 - 222 )
C.( - 1 ) + 2 + ( -3 ) + 4 + ( - 5 ) + 6 + ....+ ( - 99 ) + 100
D/ 5 - 10 + 15 - 20 + 25 - .... + 105 - 110
E/ 1 - 2 + 3 - 4 + ... + 43 - 44 + 45
Giải giúp nhé ! Cảm ơn !
tìm x
a; 35-15+x=70
b; 568-(2.x+14)=15
c; x-105:21=15
d; (x-105).21=15
(-2).(-6)2 +3.(-2)3 -62
(-6).4(-7).(-25)
(-85)+(-105)+62
24.(-15)+(-15).75-15