[(x+1/3)+1/6]-1/2:2=3/4
=>[x+1/3+1/6]-1/4=3/4
=>x+1/2=3/4+1/4=1
=>x=1-1/2=1/2
[(x+1/3)+1/6]-1/2:2=3/4
=>[x+1/3+1/6]-1/4=3/4
=>x+1/2=3/4+1/4=1
=>x=1-1/2=1/2
tìm chữ số tận cùng của A biết :
A = 1 x 2 + 1 x 2 x 3 + 1 x 2 x 3 x 4 + 1 x 2 x 3 x 4 x 5 + 1 x 2 x 3 x 4 x 5 x 6 +.......+ 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 x 11 x...x 100 + ( 1 + 2 + 3 + 4 + 5 + 6 + 9 + 1 )
Tìm x biết [(x 1/3)+1/6] -1/2 : 2 = 3/4
Bài 1: Tính
1) 2,75 - 5/6 × 2/5
2) 1,25 - ( 5/6 - 0,75 ) - 3/5
3) 4/9 × 0,75 + 8/5 + 3,125
4) 1,125 - 4/7 - 0,12
5) (1/3 + 0,4) × 3,5 + (1/6 + 0,75) × 6/5
Bài 2: Tìm x, biết
1) 1,25 × x - 0,75 = 1/3
2) x - 0,25 × 2/9 = 1/6 × 0,5
3) 3,375 × 8/9 - x = 5/6
4) 1,75 × 4/5 + x = 4,5
Bài 6: Tìm x, biết
a) \(\dfrac{3}{2}\) x \(\dfrac{4}{5}\) - X =\(\dfrac{2}{3}\)
b) X x 3\(\dfrac{1}{3}\) = 3\(\dfrac{1}{3}\) : 4\(\dfrac{1}{4}\)
c) 5\(\dfrac{2}{3}\) : x = 3\(\dfrac{2}{3}\) - 2\(\dfrac{1}{2}\)
Tìm X biết:
a,151 - 2 x (X - 6) = 2227:17
b, 2/3 - 1/3 x X = 1/4
Tìm x biết : a) x + 1 4/7= 2 2/3 b) 3 9/12 : x = 4 1/6
giúp mik với
Tìm x : biết:
a, 48 x 0.5 : X = 150 ; b, ( X +1/3 ) x 3/4 - 1/2 = 5/6
c,3/4 : ( X - 1/2 ) +1/2 =2/3 ; d,(X+1)+(X+ 2)+(X+3)+...+(X+100)= 5550
e, (1/15+1/35+1/63+1/99) x X =4 ; f,1/3+1/6+1/10+...+1 2/X(X+1) = 2017/2019
Tìm x biết :
a) x + 1/15 = 1/3 - 1/4
b) x - 5/12 = 1/3 + 1/4
c) X x 2/7 = 3/4 x 4/15
d) x : 3/8 = 4/3 : 3/6
Tìm x,biết :
a)4/7× x - 2/3=1/5
b)7/9-7/8× x =1/3
c)4/5+5/7: x=1
d)2/3×(1/4+3/4 : x)=5/6