方程组 5x—3y=2 2x-3y=—10 X= y=
3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
二元一次方程组解法 加减法:2x—y=5 x+2y=2 x+y=1 x+y/2=10 3x+y=10 2x+y=—2 x
方程组x-2y=8,3x-4y=5,x=?,y=?
解方程组X+Y/2=3X-2Y=10+6X+Y/4
解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
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 2x+y(y-2x)=9 (x+y)(x+y-3)=10
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
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