720:[41-(2x-5)]=2^3.5
720:[41-2x+5]=40
[41+5-2x]=720:40
46-2x=18
2x=46-18
2x=28
x=14
a, 2x.4=128
2x=128:4
2x=32
2x=25
x=5
Vay x=5
b, x15=x
x=1
Vay x=1
Tìm số tự nhiên x biết rằng
2x.4=128
x15=x
(2x+1)3=125
(x-5)4=(x-5)6
(x+15)-125=57 : 55
720: [ 41-( 2x - 5 )= 23 .5
27- 3 ( x + 4 ) =23
2015x . 53 = 125
1 Tìm x
a.(x-1)3=125
b2x-2x-2x=96
c.720:[41-(2x-5)]=23.5
(2x-4).(3-x) 720 : [ 41-(2x-5)]=22.5 15-x=7-(-2)
\((x-1)^3=125\)
\(2^{x+2}-2^x=96\)
\(\left(2x+1\right)^3=343\)
\(720:\left[41-\left(2x-5\right)\right]=2^3.5\)\(16^x< 128^4\)
Tìm x thuộc N biết :
a, ( x - 1 ) 3 = 125
b, 2 x + 2 - 2x = 96
c, ( 2x +1 )3 = 343
d, 720 : [ 41 - ( 2x - 5 ) ] = 23 . 5
e, 16x < 1284
1.tìm x
a,128-3.(x=4)=23 b,[(4x =28).3=55]:5=35
c,(12x-4^3).8^3=4.8^4 d,720 :[41-(2x-5)]=263.5
[ ( 6x - 72 ) : 2 - 84 ] . 4 = 8.3
720 : [ 41 - ( 2x -5 ) ] = 3^3 . 8
x + ( x+1) + ...+ ( x+10) = 110
bài 1: tìm x thuộc Z
m) (1900-2x):35 - 32 = 16
n) 720:[41 - (2x - 5)] = 2 mũ 3 . 5
o) (x-5).(x mũ 2 - 4) = 0