六年级数学单元测试P76页解答题的第26题:解方程组{2(x+y)-3(x-y)=1 {6(x+y)+7(x-y)=51
六年级数学单元测试P76页解答题的第26题:解方程组{2(x+y)-3(x-y)=1 {6(x+y)+7(x-y)=51
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51
数学书解方程组{2(x+y)-(x-y)=3,(x+y)-2(x-y)=1
已知方程组{2x+y=6,x-3y=1,不解方程组,求7y(x-3y)²-(3y-x)²的值.
求x+y/3+x-y/2=6 3(x+y)-2(x-y)=28方程组的解
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
解二元一次方程组{3(x+y)-4(x-y)=4,x+y/2+x-y/6=1
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1
解二元一次方程组:3(x+y)-4(x-y)=4,x+y/2+x-y/6+1