8 + 999 : (130-х) - 4=13 + 0x288

9+199: (130-x) - 4=13+0x*288

8+999/130-x-4=13+0

4+999/130-x=13

999/130-x=13-4

999/130-x=9

999=9 (130-x)

111=130-x

x=130-111

x=19

8 + 999 : (130-х) - 4=13 + 0x288

8 + 999 : (130-х) - 4=13 + 0

999 : (130-х) = 13 + 4-8

999 : (130-х) = 9

130-х=999: 9

130-х=111

х=130-111

х=19

проверка

8+999 : (130-19) - 4=13 + 0x288

8+999 : 111-4=13 + 0

8+9-4=13

13=13