b) /x-1/=0
x-1=0
x=1
Vậy x=1
c) 2./x-3/=6
|x-3|=3
\(\Rightarrow\orbr{\begin{cases}x-3=3\\x-3=-3\end{cases}}\)\(\Rightarrow\orbr{\begin{cases}x=6\\x=0\end{cases}}\)
Bài 2 : Tìm x :
a. 6x - 15 = 19
b. 3x + 2 =20 + ( - 12 )
c. 12x - 33 = 5 . 3 mũ 3
d. ( x+1 ) + ( x+2 ) + ... + ( x+100 ) = 5750
Tìm X
A. (X +1)+(X+2)+(X+3)+…+(X+ 100)=5750
B. X+(1+2+3+4+…+50)=2000
C. (X-1)+(X-2)+…+(X-100)=50
B1:Tính
a,3.52-16:22
b,22.17-23.14
c,15.141+59.10
d,17.85+15.17-120
e,100-[75-(7-2)]2
g,(23.94+93.45):(92.10-92)
B2:Tìm x
a,420+65.4=(x+175):3+30
b,96-3.(x+1)=42
c,(x-47)-115=0
d,(x-36):18=12
e,2x=16
B3:Tìm x
a,60-3.(x-2)=51
b,4x-20=25:22
c,8.6+288:(x-3)2=50
mk đang càn rất gấp
a)2+4+6+...+x=2450(x là số chẵn)
b)1+2+3+...+x=45
c)1x+2x+3x+...+9x=2160
d)(x+1)+(x+2)+(x+3)+...+(x+100)=5750
tìm x
5x(4x+2)+3x=240
31x57x x-57x14x x=85.57
(x+1)+(x+2)+(x+3)+.....(x+100)=5750
(8x+x+63):11=9
Tìm x
(x+1)+ (x+2)+ (x+3)+......+(x+100)=5750
433-(15x+70)= 33
(13+x).8= 136
3x- 35=40
(x+1)+(x+2)+(x+3)+...+(x+100)=5750
(x+1) + (x+2) + (x+3) +....+ (x+100) = 5750
x+1+x+2+x+3+.......x+100=5750
