giup mik voi tim x biet

1, 5-(3x+6)>-2x+1

2, -7.(x+2)-3x<6-11x

3, (x+1).(x+2)-x.(x+3)<4-x

4, 6-2x>17+(4-x)

1,Tim tap hop cac so x \(\varepsilon\)Z,biet

a.-5/7+1+30/-7_<x_< -1/6+1/3+5/6

b.8/17+5/17<x/17,6/17+9/17

c.-6/7+3/35<x<-2/5+3/7

1. tim x, biet :

A) 17-(2+x)=3

B) (6+x)+(17-21)=-25

C) 2<|x-1|<4

Giup mik nha mik cho 1 like))))♡

tim x biet 1 / 3 x 4 + 1 / 4 x 5 + 1 / 5 x 6 + 1 / 6 x 7 = 1 / x

tim x biet 1/x+1/x+2 + 1/x+5 +1/x+7= 1/x+1 +1/x+3 +1/x+4 +1/x+6

tim x biet 1/x+1/x+2 + 1/x+5 +1/x+7= 1/x+1 +1/x+3 +1/x+4 +1/x+6

1)tim x biet rang:

a)3^x-1=1/243

b)2^x+2^x+3=144

c)81^-2x.27x=9^5

2)tim tiep so ghang thu 5 cua day so sau:-1/a^2;2/a^3;-6/a^4;24/a^5;...

3)tim so tu nhien x biet :

a)4^x+4^x+3=4160

b)2^x-1+5.2^x-2=7/32

tim x biet

1/3x+2/5(x-1)=4

1/2-1/3:3x0-=5

tim stn nho nhat chia cho 5, cho 7, cho 9 co so du theo thu tu la 3;4;5

Tinh tong: 1-5/6+7/12-9/20+11/30-13/42+15/56-17/12+19/90

tim x biet:

( 1/2 +1/3+ 1/4+ 1/5+ 1/6 +1/7)x (2009 * x ) = 0.63* 0.12 - 2,1 * 0,036