10x+3y+1=0,4x+5y+8=0
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10x+3y+1=0,4x+5y+8=0
10x+3y+1=0,4x+5y+8=0
10x+3y+1=0,4x+5y+8=0
10x+3y=-1
y=-1-10x/3 (1)
原式化解得:6x=2y+7 (2)
将①带入②得x=二分之一
所以y=-2