a) Đề:
<=> (2x - 17). 56 = 59
<=> 2x - 17 = 59 : 56
<=> 2x - 17 = 53
<=> 2x - 17 = 125
<=> 2x = 142
<=> x = 71
Vậy x = 71
b) Đề:...........
<=> 3. x3 - 67 = 125
<=> 3. x3 = 192
<=> x3 = 64
<=> x = 4
Vậy x = 4
c) Đề:...........
<=> 53x - 2 - 2. 125 = 125. 3
<=> 53x - 2 - 250 = 375
<=> 53x - 2 = 625
<=> 53x - 2 = 54
<=> 3x - 2 = 4
<=> 3x = 6
<=> x = 2
Vậy x = 2
47/53. ( 17/3 - 53/47) + 17/3 .( 6/17 - 47/53)
5/7 . ( 1/2 -1/3 +4/7 ) + ( 1/3 - 1/2 -4/7 ) :7/5
tim x
3 (x-1/2 ) - 5 ( x- 2/3) = 3/2x
help me mik dang can gap . cam on
Tìm x
a)7/x+4/5×9+4/9×13+...+4/41×45=29/93
b)x+2/1×3+2/3×5+...+2/49×51=5/17
c)1/4-1/2×4-1/4×6-...-1/2x(2x+2)=23/176
a) 2/3+1/3:x=3/5
b) 10/3x +67/4=-13,25
c) x+30℅x=-1,3
d) (14/5x -50):2/3=51
e) 2/5+3/5.(3x-3,7)= -53/10
f) 2/3x -3/2x =5/12
a)7/x+4/5×9+4/9×13+...+4/41×45=29/93
b)x+2/1×3+2/3×5+...+2/49×51=5/17
c)1/4-1/2×4-1/4×6-...-1/2x(2x+2)=23/176
Tìm x
Bài 1 : Tính nhanh
a) (-48)-72+36*(40-404)
b) 25*(-23)+47*(-35)-20*(-35)
c) 29*(67)-45*67+26*(67)
d) 4*(-5)-125*(-2)mũ 3+(-10) mũ 3*(-2)
Bài 2: Tính nhanh
a) (26-6)*(-4)+31*(-7-13)
b) (47-17)*(-5)+22*(-13-17)
c) (35-85)*11+29*(-14-36)
d) (153-53)*(-37)+37*(-42-58)
Giúp mình với nhé
Tím x biết:
a, 461+(x-45)=387
b, 11-(-53+x)=97
c, -(x+84)+213=-16
d, 2. (x-5)-3(x-4)=-6-15.(-3)
e, 15-(4-x)=6
j, -30+(25-x)=-1
g,(2x-5)+17=6
h, 10-2(4-3x)=-4
i,-12+3(-x+7)=-18
k,24:(3x-2)=-3
l,-45:5.(-3-2x)=3
m, 3x+27=9
1 6 41 .[ 12+ 12 19 - 12 37 - 12 53 3+ 1 3 - 3 37 - 3 53 : 4+ 4 17 + 4 19 + 4 2006 5+ 5 17 + 5 19 + 5 2006 ]. 124242423 237373735
Bài 1 tính nhanh
c |-54|:(-9)+(-5)\(^2\)(-1)^2015
d 35.(65-24)-65.(35+24)
Bài 2 tìm số nguyên x
a 12 -(-53+2x)=93
b x+(-17)=(-23)-x
c (x-5).(1-x)\(^2\)=0
tìm x biết:
(3x-1) [- 1/2x+5]=0
1/4+1/3:(2x-1)=-5
[2x+3/5]2 - 9/25=0
-5(x+1/5)-1/2(x-2/3)=3/2x - 5 /6
[x+1/2]x [2/3-2x]=0
17/2-|2x-3/4|=-7/4
2/3x-1/2x =5/12
(x+1/5)2+17/25=26/25
[x.44/7+3/7].11/5-3/7=-2
3[3x-1/2]+1/9=0
