解方程组{4x+8(x+y)=480,4y+9(x+y)=480
9y=3x-(x-1),4(x+y)-(x+4)=8y解方程组
解方程组{4/x+y+6/x-y=3, 9/x-y-1/x+y=1
解方程组:{4/x+y+6/x-y=3 9/x-y-1/x+y=1}
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=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(1/X+Y)-(1/Y-X)=8/15,(5/X+Y)-5/Y=4
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,
方程组x-2y=8,3x-4y=5,x=?,y=?
解方程组8x+5y=-9 4x+3y=-7
解方程组X+Y/2=3X-2Y=10+6X+Y/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