Question

4-(5-y) - 30
-8-(9+x) + 50
-12-(-a-2) - 10
20 + 3(x - 15)
16 - 4(2 +
42-6(7+ y)​

Answer 1

1)4-(5-y)-30=4-5+y-30=-31+y

2)-8-(9+x)+50= -8-9-x+50=33-x

Извини дальше не знаю