| | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 6 | × | 4 | p | − | 6 | q | − | 2 | × | 7 | p | + | 2 | × | 6 | q | = | 10 | p | + | 6 | q | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|
| (2) | | | | | | | | | | | | | | | | | | | | | | | | | 5 | ( | 9 | a | − | 6 | b | + | 6 | ) | + | 3 | ( | 5 | a | + | 2 | b | + | 8 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 5 | × | 9 | a | − | 5 | × | 6 | b | + | 5 | × | 6 | + | 3 | × | 5 | a | + | 3 | × | 2 | b | + | 3 | × | 8 | = | 60 | a | − | 24 | b | + | 54 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|
| | | | | | | | | | | | | | | | | | | | | | | | | | = | 7 | × | 10 | p | − | 7 | × | 7 | − | 10 | × | 9 | p | − | 10 | = | −20 | p | − | 59 | | | | | | | | | | | | | | | | | | | | | | | | |
|
| (4) | | | | | | | | | | | | | | | | | | | | | | | | | 5 | ( | 7 | p | + | 9 | q | + | 3 | ) | − | 2 | ( | 4 | p | − | 2 | q | + | 5 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 5 | × | 7 | p | + | 5 | × | 9 | q | + | 5 | × | 3 | − | 2 | × | 4 | p | + | 2 | × | 2 | q | − | 2 | × | 5 | = | 27 | p | + | 49 | q | + | 5 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|
|
|
|
|
| (7) | | | | | | | | | | | | | | | | | | | | | | | | | 7 | ( | 6 | x | − | 2 | y | + | 7 | ) | + | 9 | ( | 3 | x | − | 8 | y | + | 6 | ) | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 7 | × | 6 | x | − | 7 | × | 2 | y | + | 7 | × | 7 | + | 9 | × | 3 | x | − | 9 | × | 8 | y | + | 9 | × | 6 | = | 69 | x | − | 86 | y | + | 103 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|