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

ОГРОМНОЕ СПАСИБО

d + 1/5 = 4/7 + 3/7d + 1/5 = 7/7d + 1/5 = 1d = 1 - 1/5d = 5/5 - 1/5d = 4/5------------------4/5 + 1/5 = 4/7 + 3/75/5 = 7/71=1f + 4/5 = 4/7 + 3/7f + 4/5 = 7/7f + 4/5 = 1f = 1 - 4/5f = 5/5 - 4/5f = 1/5----------------------------1/5 + 4/5 = 4/7 + 3/75/5 = 7/71 = 1b + 2/5 = 4/7 + 3/7b + 2/5 = 7/7b + 2/5 = 1b = 1 - 2/5b = 5/5 - 2/5b = 3/5--------------------------------3/5 + 2/5 = 4/7 + 3/75/5 = 7/71 = 1