X-3/5=1+2/3 4/7:X=1/2x2/5
X-3/5=5/3 4/7:X=1/5
X=5/3+3/5 X=4/7:1/5
X=34/15 X=4
Vậy X=34/15 Vậy X=4
X - 3/5 = 1 + 2/3.
<=> X = 1 + 2/3 + 3/5
<=> X = 15/15 + 10/15 + 9/15
<=> X = 34/15
4/7 : x = 1/2 x 2/5
<=> X = 4/7 : (1/2 x 2/5)
<=> X = 4/7 : 2/10
<=> X = 4/7 x 10/2
<=> X = 40/14
<=> X = 20/7
x- 3/5= 1+ 2/3 4/7 :x =1/2x 2/5
x- 3/5= 5/3 4/7: x = 1/5
x = 5/3+ 3/5 x = 4/7: 1/5
x = 34/15 x = 20/7