Các câu hỏi tương tự
Tìm x biet:
a,5/2x+x=32/15
b,x-7/2x=-32/15
c,-7/3x-7/4x+11/3=18/5
d,-5/6-3x=2/3
e,2x-5/9=-2/3
f,1/2-2/3x=7/12
g,7-|2x-3|=4
h,(19x+2.5^2):14=(13-8)^2-4^2
i,3/4x-2/3=2/7.1/6+5/7.1/6
k,(x+1/2).(2/3-2x)=0
l,x/2013-1/10-1/15-1/21-........-1/120=5/8
1/3 x 5 + 1/5 x 7 + 1/7 x 9+ ... + 1/(2x + 1) x (2x + 3) = 15/93.tinh x
1)tìm x nguyên biết : 15-| -2x+3| * | 5+4x| = -19
2)tìm x;y nguyên dương biết: | x-2y+1| * | x+4y+3|= 20
a,2/5+3/7+-3/5
b,1-5/7:x=-1/3
c,4/5*(x-1/3)=15/8
d,2/3:(2x+1/8)=7/3
e,2x+3/4=10/3-5/4
giúp mình với
a)x+3/5=-1/15
b) x/14=1/7-3/14
C)-1/2x+1/5=3/10
d) 4/5-(2/15+x)=1/15
1. Tìm số tự nhiên x biết 1) 3^x . 3=243 2) 7.2^x=56 3) x^3=8 4)x^20=x 5) 2^x-15=17 6) (2x+1)^3=9.81 7) x^6:x^3=115 8) ( 2x-15)^5=(2x-15)^3 9) 3^x+2-5.3^x=36 10) 7.4^x-1+4^x+1=23 Giúp tớ bài này với
1)(2x+1)-7=14
2)15-(3x-1)+11=59
3)70-5(x-3)=45
4)412-15.(nhân)(27-x)=97
5)2008(2x+7)=112
6)126-17(3x-5)=7
7)(2600+6400)-3x=1200
8)123-5(x+4)=38
GIÚP MIK GIẢI NHÉ !!! @.@
Tìm x biết
a)1.3.5.....47/26.27.28.....48=1/2x
b)(1+1/3).(1+1/8).(1/15)...1+(1/x.(x+2))
C1:
a)x+3/5=-1/15
b)x/14=1/7-3/4
c)-1/2x+1/5=3/10
d)4/5-(2/15+x)=1/15