Giải thích các bước giải:
1)
x + 5/4 = (3/2)^2
x + 5/4 = 9/4
x =9/4 - 5/4
x =1
2)
3/4 + 2/5.x = 19/20
2/5x = 19/20 - 3/4
2/5x = 19/20 - 15/20
2/5x = 4/20
2/5x = 1/5
x = 1/5 : 2/5
x =1/2
3)
-1/4 - 3/4 : x = -11/36
3/4 : x = (-1/4 - -11/36)
3/4 : x = 1/18
x =3/4 : 1/18
x = 27/2
4)
5/7 + 2/3.x = 3/10
2/3x =3/10-5/7
2/3x =-29/70
x =(-29/70) : 2/3
x =-87/140
5)
-22/15.x + 1/3 = |-2/3 + 1/5|
-22/15.x + 1/3 =7/15
-22/15.x =7/15 - 1/3
-22/15.x =2/15
x = 2/15 : (-22/15)
x = -1/11