方程组3x+4y=5.3x-7y=6中x的系数特点是————,方程组2X+5Y=1,3x-5y=4中y的系数特点是.这两个方程组用.法接较简便

解方程组：｛4x+5(x-y)=30,4y-3(x-y)=6 解方程组,x+y/2=3x-2y=10+6x+y/4, 在二元一次方程组4x+3y中,x,y互为相反数,x= y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无 已知方程组(x+y)-3(x-y)=7 解二元一次方程组：3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1 解方程组;x+y/2=x-y/3=6 4(x+y)-3(x-y)=-20 解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3 2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组 解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 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2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk 3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组 解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 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⑴(x+y)/2-(x-y)/3=6,⑵3(x+y)=4(x-y)