解方程。{2⼀3x-3⼀4y=1⼀2;4(x-y)-3(2ⅹ+y)=17。则ⅹ=()y=()?

2024-11-18 04:30:34
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回答1:

8x - 9y = 6;-2x-7y=17;解得y = -2,x = -1.5