1.方程组 2x+y=4/3 ,6x+3y=4 的解得情形是?A有唯一解 B无解 C有两解 D有无数解2.已知关于X、Y的方程 x+ay=1 ,3x-y=1的解是整数,a是整数,那么a的值为?3.方程组 x+（1+k）y=0 ①（1-k）x+ky=1+k② 有解,求K的值

3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组 解方程组,x+y/2=3x-2y=10+6x+y/4, 已知方程组{2x+y=6,x-3y=1,不解方程组,求7y(x-3y)²-(3y-x)²的值.已知方程组{2x+y=6,{x-3y=1.不解方程组,求7y(x-3y)²-(3y-x)²的值.已知方程组{2x+y=6，{x-3y=1.不解方程组，求7y(x-3y)²-(3y-x)³ 2元一次方程组 2/x+y+3/x-y=6 4(x+y)-3(x-y)=-20 解方程组;x+y/2=x-y/3=6 4(x+y)-3(x-y)=-20 解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 解方程组⑴(x+y)/2-(x-y)/3=6,⑵3(x+y)=4(x-y) 解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3 解方程组4（x+y)-3(x-y)=14;(x+y)/2+(x+y)/3=6 解二元一次方程组3(x+y)-4(x-y)=4 x+y/2+x-y/6=1 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk 解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1 一道二元一次方程组!3(x+y)-4(x-y)=4,(x+y)/2+(x-y)/6=1 解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2 解二元一次方程组{x+y/2+x-y/3=6,4(x+y)-2=5(x-y) 解方程组2分之x+y+3分之x-y=6 4(x+y)-5(x-y)=2 解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4