Решите уравнения срочно надо d + 1/5 = 4/7 + 3/7 f + 4/5 = 4/7 + 3/7 b + 2/5 = 4/7 + 3/7 например 3/3 это я так зделал дробь

d + 1/5 = 4/7 + 3/7 d + 1/5 = 7/7 d + 1/5 = 1 d = 1 - 1/5 d = 5/5 - 1/5 d = 4/5 ------------------ 4/5 + 1/5 = 4/7 + 3/7 5/5 = 7/7 1=1 f + 4/5 = 4/7 + 3/7 f + 4/5 = 7/7 f + 4/5 = 1 f = 1 - 4/5 f = 5/5 - 4/5 f = 1/5 ---------------------------- 1/5 + 4/5 = 4/7 + 3/7 5/5 = 7/7 1 = 1 b + 2/5 = 4/7 + 3/7 b + 2/5 = 7/7 b + 2/5 = 1 b = 1 - 2/5 b = 5/5 - 2/5 b = 3/5 -------------------------------- 3/5 + 2/5 = 4/7 + 3/7 5/5 = 7/7 1 = 1