(2x - 4)3 = 8
(2x - 4)3 = 23
2x - 4 = 2
2x = 2 + 4
2x = 6
x = 6 : 2
x = 3
\(\frac{720}{41-\left(2x-5\right)}=2^3\times5\)
\(\frac{720}{41-2x+5}=8\times5\)
\(46-2x=\frac{720}{40}\)
\(2x=46-18\)
2x = 28
x = 28 : 2
x = 14
Tìm số nguyên x , biết:
13) 720 : [ 41 - ( 2x - 5) = 2\(^3\) . 5
14) { [ 2x + 14) : 2\(^2\) - 3] : 2} - 1 = 0
nhanh nha!!!!
1, Tìm x
a, (2x+1)3=243
b, 2x+2 - 2x = 96
c, 720 : [41- (2x-5)] = 23. 5
thanks
3 tick
b) 1500.(x – 7) = 0
c) (2.x – 4).(48 – 12.x) = 0
d) (x + 12).(x – 1) =0
Bài 2: Tìm x biết:
a) 128- 3(x+ 4) = 23
b) [(14x+ 26). 3+ 55]: 5= 35
d) 720: [41- (2x- 5)]= 23. 5
720:[41-(2x-5)]=40
Tìm x:\(720:\left[41-\left(2x-5\right)\right]=2^3.5\)
TÌm x, biết:
a, 512-(128-5x)=3x+12
b, (2x-1)+(4x-2)+...+(400x-200)=5+10+...+1000
c, (x+2)+(4x+4)+(7x+6)+...+(25x+18)+28x+20)=1560
d, x+4x+5x+9x+14x+...+97x=500
e, 720-[41-(2x-5)]=23.5
f, 697:\(\dfrac{15x+364}{x}\)=17
Tìm x:
1) 280-(x-140):35=270 4) x17=x
2) 720:[41-(2x-5)]=23.5 5) 5x:52=125
3) (3x-4).(x-1)3=0 6)(x+2)5=210
6 : (x -1)
[(4x+28).3+55]=35
720:[41-(2x-5)]=2^3.5
thank các bạn nhiều lắm!
ai giúp mình bài này với
t) 1440:[ 41 - ( 2x -5)] = 2^4 .3