方程组 5x-3y=12 3x+4y=-8
方程组x-2y=8,3x-4y=5,x=?,y=?
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
解下列方程组 3x=4(x-y) x-8(x-y)=5
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,
已知关于x、y的方程组3x+5y=4 5x+3y=12 求x+y与x-y的值.
已知方程组:5x+y=3 ; ax+5y=4与方程组x
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
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4