解方程组{5x-2y=6,3x-2y=15
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解方程组{5x-2y=6,3x-2y=15
解方程组{5x-2y=6,3x-2y=15
解方程组{5x-2y=6,3x-2y=15
5x-2y=6 ①
3x-2y=15 ②
由①-②得:
2x=-9
x=-9/2
把x=-9/2代入①得:
-45/2-2y=6
-2y=57/2
y=-57/4
所以方程组的根为:x=-9/2
y=-57/4
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