Các câu hỏi tương tự
Tim x biet : 20 . 2^x + 1 = 10.4^2 + 1
Tim x : ( 4-x:2)^3 - 1 = 2 . (2^3 - 5 : 2^0 )
tim x biet : ( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) + ... + ( x + 100 ) = 5750
1) Tim x
a) x + 1/2 . x - 25% . x = 10
b) x + x -1 + x-2 + x-3 + x-4 +........+x - 5= 255
Tim x biet
A 3/2.x-2/5=1/3.x-1/4
B -51/2.x+1=3/4-7/6
C 2.x-2/3=7.x+3/2-1
D 3/2.x-2/5=1/3.x -1/4
Tim x
x+1/99+x+2/98+x+3/97+x+4/96=-4
tim x : a, /x+13/ - / x+2/ = 5 . b, /x-4/ - /x-1/= -3
Tim số nguyên x biết: |x+1|+|x+2|+|x+3|+|x+4|+|x+5|=6x
Tim x,bietx/1×2+x/2×3+x/3×4+...+x/2006×2007=2006/2007
tim x thuoc z biet
(x-1)(x-3)=-5
(x+1)(x+4)=0
(x^2-4)(x^2-19)<0