a) x + 4/5 = 1/5x = 1/5 - 4/5x = -3/5
б) 2/15 - y = 13/15-y = 13/15 - 2/15-y = 11/15y = -11/15
в) a - 38/105 = 41/105a = 41/105 + 38/105a = 79/105
a) x + 4/5 = 1/5
x = 1/5 - 4/5
x = -3/5
б) 2/15 - y = 13/15
-y = 13/15 - 2/15
-y = 11/15
y = -11/15
в) a - 38/105 = 41/105
a = 41/105 + 38/105
a = 79/105