6x-7=2(x-y) x+y/2-1=0解二元一次方程

问题描述:

6x-7=2(x-y) x+y/2-1=0解二元一次方程

6x-7=0,x=7/6.将x=7/6代入 2﹙x-y﹚x+y/2-1=0 得,2×7/6×﹙7/6-y﹚ +y/2=1 49/18-7y/3+y/2=1 ﹣y/3=﹣31/18 y=31/6