解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3
解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3
解方程组(三分之x+y)+y=6,3(x+y)-y=24
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3
解下列方程组 1.4x+3y=24 5x-y=30 2.5x+3y=8 7x-3y+4
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组x+y/3=x-y/4 2x+3y=11
方程组x-2y=8,3x-4y=5,x=?,y=?
解方程组X+Y/2=3X-2Y=10+6X+Y/4
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,
解方程组lg(x-y)+lg(7x-8y)=2,2^(-x+3y)=4
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组