=>-x+0,2x=28
=>-0,8x=28
hay x=-35
\(x-x\times2+x:\dfrac{1}{5}=28\)
\(4x=28\)
\(x=28:4\)
\(x=7\)
Tìm số tự nhiên x, biết x chia cho 3 dư 1 chia 5 dhuw 2 và 20 < x < 30
a x= 27
b x = 26
c x= 28
d x= 22
Tìm x:
( x+1) + (x+2) + (x+3) + (x+4) + (x+5) = 45
X - X x 2 + X : 1/5 = 28
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 nhanh :
1/2 x 17/5 x 1/6 + 1/3 x 71/5 x 1/4 - 1/12 x 28/5
Tìm x:
(x + 1) + (x + 3) + (x + 5) + .... + (x + 19) = 110
tìm x
x+1/4=3/2
x-1/3=11/5
x×3/7=8/11
8/9:x=1/2
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
a.35/28-x=5/14 b.6/7x X= 2/3
C.X x 7=3/4 D.2: x -1/3=2/5
