Các câu hỏi tương tự
(x+1)+(x+3)+(x+5)+.....+(x+19=110
(x+1) + (x+3) +(x+5)+...+(x+19)=110
Tìm x:
( x+1) + (x+2) + (x+3) + (x+4) + (x+5) = 45
tìm x : 5/6-(x2/8)=1/4
(x-3/5)×3/4=21/20
49/45:x/9=7/5
x×1/5+x×1/5+x×3/5=8/9
8/9:x-5/9:x=1/36
5/4×(x×2)=11/4
tìm x
x+1/3=4/5
x-1/2=2/7
4/7×x=1/3
x:2/5=2/9
20×7:(5×x-3×5)=4
x-270=420:105
x-140:35=270
tính K = 1/1 x 2 x 3 + 1/2 x 3 x 4 + 1/3 x 4 x 5 + ..... + 1/18 x 19 x 20
a) 1+4/3
b) 5/9 : 2/3
c ) 4/3-1/3x5/2
d) ( 3/2-3/8):1/2
e) 15/16 : 3/8 x 3/4
f) 7/19 x 1/3 x 7/19 x 2/3
g) 3/5x 8/27 x 25/3
h) 1/5 + 4/11 + 4/5 + 7/11
tìm x
x+1/4=3/2
x-1/3=11/5
x×3/7=8/11
8/9:x=1/2
Tìm x: X - X x 2 + X : 1/5= 28