1)
(x - 7) + а = 23,
х = 9,
(9 - 7) + а = 23,
2 + а = 23,
а = 23 - 2,
а = 21,
2)
(11 + х) + 101 = а,
х = 5,
(11 + 5) + 101 = а,
а = 16 + 101,
а = 117
1)
(x - 7) + а = 23,
х = 9,
(9 - 7) + а = 23,
2 + а = 23,
а = 23 - 2,
а = 21,
2)
(11 + х) + 101 = а,
х = 5,
(11 + 5) + 101 = а,
а = 16 + 101,
а = 117
(9-7)+а=23
9-7+20=23
23=23
а=20
(11+х) +101=а
(11+5)+101=а
11+5+101=117
117=117
а=117