1) AB=BC+1 AC:AB=9:7 Найти:BC

Предыдущий
вопрос Следующий
вопрос

Let's set up a proportion to solve for BC:
AC/AB = BC/(BC + 1)
9/7 = BC/(BC + 1)

Cross multiply:
9(BC + 1) = 7BC
9BC + 9 = 7BC

Now, we can solve for BC:
9BC - 7BC = 9
2BC = 9
BC = 9/2
BC = 4.5

Therefore, the value of BC is 4.5.