thực hiện phép tính 1 cách hợp ly : 1 x 2 x 3 x .... x 9 - 1 x 2 x 3 x ...... x 8 - 1 x 2 x 3 x ....... x 8 x 8
tìm x
a) -1/8 = 3/x b) x/3 = 3/x c)3/4 . x = 1 và 1/2
d) x - 3/10 = 7/15 : 3/5 e) -4/7 - x = -8/3 . 3/7
f) 4/7 . x - 2/3 = 1/5 g) 2/3 + 1/3 : 3 x = 1/5
h) 2/9 - 7/8 x=1/3 j) (2 và 4/5 x - 50) : 2/3 = 51
\(\dfrac{3}{2}X-0,2=\dfrac{3}{5}\)
\(\dfrac{1}{3}+x=\dfrac{3}{4}\)
\(1\dfrac{1}{2}x-\dfrac{2}{5}=\dfrac{1}{4}\)
\(\dfrac{11}{8}-\dfrac{3}{8}.x=\dfrac{1}{8}\)
giúp với
Tìm x
a. x - 3/4 = 6 x 3/8
b.7/8 : x = 3 1/2
c.x + 1/2 x 1/3 = 3/4
Tìm x
a) -1/2 . x = 5
b) x-1/9 = 8/3
c) x + 5/6 = 16/42 - -8/56
d) 1 3/4x - 5 = -3 1/3
e) 3 1/3 - 3/4 : x = -1/6
g) 3/x + 5 = 15%
h) 1/2 + 1/2.3 + 1/3.4 +...+1/x(x+1) = 49/50
Tìm x
a) -1/2 . x = 5
b) x-1/9 = 8/3
c) x + 5/6 = 16/42 - -8/56
d) 1 3/4x - 5 = -3 1/3
e) 3 1/3 - 3/4 : x = -1/6
g) 3/x + 5 = 15%
h) 1/2 + 1/2.3 + 1/3.4 +...+1/x(x+1) = 49/50
bài 3:
a) x - 3/4 = 6 x 3/8 b) 7/8 : x = 3 - 1/2 c) x + 1/2 x 1/3 = 3/4
d) 3/2 x 4/5 - x = 2/3 e) X x 3 1/3 = 3 1/3 : 4 1/4 f) 5 2/3 : x = 3 2/3 - 2 1/2
Bài 1: Tìm x
x-7/12.x=5/24-3/8.x
(x-1/2).(-3-x/2)=0
x-3/-2=-8/x-3
=) (x-3).(x-3)=(-2).(-8)
(x-3) mũ 2 =16
Tìm x biết:
1/ \(\dfrac{3}{5}-x=0,2\)
2/ \(\dfrac{x}{3}-\dfrac{1}{8}=\dfrac{5}{8}\)
3/ \(3\dfrac{1}{3}.x-6\dfrac{3}{4}=3\dfrac{1}{4}\)
A =1/2 x 1/3 + 1/3 x 1/4 + 1/4 x 1/5 + 1/5 x 1/6 + 1/6 x 1/7 + 1/7 x 1/8 + 1/8 x 1/9