(a+63)+17=101
1) (a+63) = 101-17
a+63 = 84
a+63-84 = 0
a-21=0
a = 21
2) a+63-101+17 = 0
a-21 = 0
(a+57)-35=61
1) (a+57) = 61+35
a+57 = 96
a+57-96 = 0
a-39 = 0
a = 39
2) a+57-35-61 = 0
(а+63)+17=101
101-17=84
84-63=21
101-63=38-17=21
(а+57)-35=61
61+35=96-57=39
61-57=4+35=39
(a+63)+17=101
1) (a+63) = 101-17
a+63 = 84
a+63-84 = 0
a-21=0
a = 21
2) a+63-101+17 = 0
a-21 = 0
a = 21
(a+57)-35=61
1) (a+57) = 61+35
a+57 = 96
a+57-96 = 0
a-39 = 0
a = 39
2) a+57-35-61 = 0
a-39 = 0
a = 39
(а+63)+17=101
101-17=84
84-63=21
101-63=38-17=21
(а+57)-35=61
61+35=96-57=39
61-57=4+35=39