e) 8a – (6a - 2) =
1f) 3 (5 – 4x) + 10 =
g) 3 + 5y – 4 (2y + 5) =
h) 5 (3b + 4) – 2 (6 – 7b) =​


Odpowiedź :

Hej!

8a - (6a - 2) = 8a - 6a + 2 = 2a + 2

3(5 - 4x) + 10 = 15 - 12x + 10 = -12x + 25

3 + 5y - 4(2y + 5) = 3 + 5y - 8y - 20 =

= -3y - 17

5(3b + 4) - 2(6 - 7b) = 15b + 20 - 12 + 14b =

= 29b + 8

Pozdrawiam! - Julka