6χ-3y=-3 2X-5y=-3
1个回答
6χ-3y=-3
5X-9y=-35
5X-9y-3(6χ-3y)=-26
5x-9y-18x+9y=-26
-13x=-26
x=2
代入1式
y=5
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(1)6x-3y=-3,5x-9y=-35 (2)2x-5y=-3,5x-2y=-18 (3)x/3-y/4=1,3X-