Номер 1148
1) 0 – x = –9
x = 0 – (–9)
х = 0 + 9
х = 9
0 – 9 = –9
2) 7 – х = –2
х = 7 – (–2)
х = 7 + 2
х = 9
7 – 9 = –2
3) х – 5 = –2
х = –2 + 5
х = 3
3 – 5 = –2
4) х – 9 = –1
х = –1 + 9
х = 8
8 – 9 = –1
5) –2 – х = 7
х = –2 –7
х = –9
–2 – (–9) = 7
6) –1 – х = –9
х = –1 – (–9)
х = 8
–1 – 8 = –9