换元法解方程组3/x+y+2/x-y=17/5 2/x+y-5/x-y=1
换元法解方程组3/x+y+2/x-y=17/5 2/x+y-5/x-y=1
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
方程组x-2y=8,3x-4y=5,x=?,y=?
解二元一次方程组 x+y=3 1/2(x+y)-3y=5
解方程组: {3x+2y=13 3x-2y=5 {x-y/3=x+y/2+1 2x-5y=9
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
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
解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2