1. 5x-9y=17(1)
8y-3x=-5(2)
2. 3x+7y=26(1)
4x+5y=13(2)
3. 9x-11y=15(1)
7x-13y=25(2)
4., 14x+2y+1(1)
38x+5y=7(2)
5. x-y=7(1)
y-4/3=x(2)
6. 5x+7y=44597(1)
7x+9y=58939(2)
希望大家幫下我!!!