| | | | | | | | | | | | | | | | | | | | | | | | | | = | 2 | × | 7 | p | + | 2 | × | 4 | + | 9 | × | 4 | p | + | 9 | × | 10 | = | 50 | p | + | 98 | | | | | | | | | | | | | | | | | | | | | | | | | |
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(2) | | | | | | | | | | | | | | | | | | | | | | | | 10 | ( | 4 | a | + | 4 | b | + | 7 | ) | + | 5 | ( | 3 | a | + | 4 | b | − | 10 | ) | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 10 | × | 4 | a | + | 10 | × | 4 | b | + | 10 | × | 7 | + | 5 | × | 3 | a | + | 5 | × | 4 | b | − | 5 | × | 10 | = | 55 | a | + | 60 | b | + | 20 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | = | 6 | × | 3 | p | + | 6 | × | 4 | + | 2 | × | 8 | p | + | 2 | × | 2 | = | 34 | p | + | 28 | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 5 | × | 9 | a | − | 5 | × | 4 | b | + | 5 | × | 9 | + | 3 | a | + | 3 | b | + | 3 | × | 8 | = | 48 | a | − | 17 | b | + | 69 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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(5) | | | | | | | | | | | | | | | | | | | | | | | | 9 | ( | 5 | x | − | 4 | y | − | 1 | ) | − | 3 | ( | 10 | x | + | 8 | y | − | 9 | ) | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 9 | × | 5 | x | − | 9 | × | 4 | y | − | 9 | − | 3 | × | 10 | x | − | 3 | × | 8 | y | + | 3 | × | 9 | = | 15 | x | − | 60 | y | + | 18 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | = | 2 | × | 5 | u | − | 2 | × | 3 | + | 10 | × | 9 | u | + | 10 | × | 3 | = | 100 | u | + | 24 | | | | | | | | | | | | | | | | | | | | | | | | | |
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(7) | | | | | | | | | | | | | | | | | | | | | | | | 10 | ( | 8 | u | − | 3 | v | − | 10 | ) | + | 10 | ( | 9 | u | + | 9 | v | − | 2 | ) | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | = | 10 | × | 8 | u | − | 10 | × | 3 | v | − | 10 | × | 10 | + | 10 | × | 9 | u | + | 10 | × | 9 | v | − | 10 | × | 2 | = | 170 | u | + | 60 | v | − | 120 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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