Sửa đề: \(\dfrac{x-2}{7}+\dfrac{x-1}{8}=\dfrac{x-4}{5}+\dfrac{x-3}{6}\)
=>\(\dfrac{x-2}{7}-1+\dfrac{x-1}{8}-1=\dfrac{x-4}{5}-1+\dfrac{x-3}{6}-1\)
=>x-9=0
=>x=9
Sửa đề: \(\dfrac{x-2}{7}+\dfrac{x-1}{8}=\dfrac{x-4}{5}+\dfrac{x-3}{6}\)
=>\(\dfrac{x-2}{7}-1+\dfrac{x-1}{8}-1=\dfrac{x-4}{5}-1+\dfrac{x-3}{6}-1\)
=>x-9=0
=>x=9
Tìm x biết : a) -5/6-x=7/12+(-1)/3 b) 2.(x-1/3)=(1/3)^2+5/9 c) |2x-3/4|-3/8=1/8 d) 2/3x+1/6x=3 và 5/8
a)x+1/5=5/6.b)x-3/5=6/7.c)-x-7/5=-8/9.d)3/8-x=2/3.e)|x-8/9|=1/3
A,3.x - 16 : 2^3= 31; B,2^10 : 2^8 + 3. [4. 7 + 3.4 ] ; C,4^6 : 4^3 - 2^2 . 2^3; D,141 + 2^5 . 2^4 - 3^1 . 3^2 ; E,x + 2^5 : 2^4 = 4.4^2 giúp mình với
(12x-43).83=84.4 |x-2|=0
(2400+6300)-3.x=1200 |x+3|=|5|+|-5|
219-7(x+1)=100
(3x-6).3=81
x3=125
x3=81
tìm số tự nhiên x,biết rằng nếu nhân nó với 5 cộng thêm 16,sau đó chia cho 3 được 7
Tìm x
a,x/15=2/5
b,3/x-7=27/135
c,320.x-10=5.48:24
d,5.x-1952=2500-1947
e,(x+1)+(x+2)+(x+3)+(x+4)+(x+5)=45
f,x-2/3-2/15-2/35-2/63=1/9
g,(x-1.3/4).3/2.2+1/2-3/2=2
h,2/6+2/12+2/20+...+2/x.(x+14)=2013/2015
k,3+5+7+...+2015/2+4+6+...+2014+x=1
1/3 x + 1/2 = -4/3
-2/3 - 4/3 x = -1/2
5/2 - 2 (x-1) = -2/3
7/-2 x - 1/3 = -1/2
8/5 - 1/2 : x = 8/3
-5/4 x - 1/2 x = -7/3
ét ô ét
1.Tìm x biết:
a, x/5=x/-1
b, 3(x-1)/-5=4(x+2)/6
c,7-2x/3=0.75-5/4
1. Tìm x biết:
a, 3(x+2)-4x=2(3x-1)+8
b, 5(3-x)-6(x+1)=1/2(2x-4)
tính x biết :
1+3+5+7+9+...............+99
_____________________ = 1
2+4+6+8+...............+98+x