1) (4/15) + (11/5) = 1/3 + 11/5 = (5 + 33)/15 = 38/15
2) (16/21) - x = 9/21Найдем общий знаменатель у дробей: 2116 - 21x = 9-21x = 9 - 16-21x = -7x = 7/21 = 1/3
3) x - (4/35) = 12/35x = 12/35 + 4/35x = 16/35
1) (4/15) + (11/5) = 1/3 + 11/5 = (5 + 33)/15 = 38/15
2) (16/21) - x = 9/21
Найдем общий знаменатель у дробей: 21
16 - 21x = 9
-21x = 9 - 16
-21x = -7
x = 7/21 = 1/3
3) x - (4/35) = 12/35
x = 12/35 + 4/35
x = 16/35