Bài 1
a)5/7 x 5/11 + 5/7 x 2/11 - 5/7 x 14/11
=5/7 x (5/11 + 2/11 - 14/11)
=5/7 x 7/11
=5/11
Bài 2
b)\3/2x - 75%\ + 2/3=7/4
\3/2x - 3/4\ =7/4-2/3
\3/2x - 3/4\ =13/12
Suy ra
+)3/2x - 3/4 = 13/12
3/2x =13/12 + 3/4
3/2x =11/6
x =11/6 : 3/2
x = 11/9
+)3/2x - 3/4=-13/12
3/2x =-13/12 + 3/4
3/2x =-1/3
x =-1/3 : 3/2
x = -2/9
Vậy x=11/9 và x=-2/9\\