Răspuns:
a)x + 2/9 = 7/4 × 1/7
x + 2/9 = 1/4
x = 1/4 - 2/9
x = 1/36
b)x + 2/9 = 2,25 : 1,5
x + 2/9 = 1,5
x + 2/9 = 3/2
x = 3/2 - 2/9
x = 11/18
c)x - 1 = 7/4 × 9/14
x - 1 = 9/8
x = 9/8 + 1
x = 17/8
d)x + 1/7 = 15 × 4/3
x + 1/7 = 20
x = 20 - 1/7
x = 139/7
e)x - 1/2 = 12 × 5/6
x - 1/2 = 10
x = 10 + 1/2
x = 21/2
f)x - 1/2 = 15/14 × 7/3
x - 1/2 = 5/2
x = 5/2 + 1/2
x = 3