It looks like you’ve uploaded a math exercise in Ukrainian. Let me break it down and provide you with the solutions:

1. Завдання №9
   The task is to expand the parentheses and solve:
   $-4.7 - (a - 4.7) + a = -4.7$.
   Expanding and simplifying:
   $-4.7 - a + 4.7 + a = -4.7 \implies 0 = -4.7$
   The equation doesn’t make sense as it simplifies to $0 = -4.7$, which is false. So, there may be a typo or error in the problem.

2. Завдання №10
   The task is