解方程组:1/4(2x+3y)+1/3(2x-3y)=7 1/3(2x+3y) +1/2(2x-3y)=8
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解方程组:1/4(2x+3y)+1/3(2x-3y)=7 1/3(2x+3y) +1/2(2x-3y)=8
令2x+3y=m,2x-3y=n m/4+n/3=7 3m+4n=12*7 6m+8n=24*7 m/3+n/2=8 2m+3n=48 6m+9n=48*3 n=48*3-24*7=-24 m=60 2x+3y=60 2x-3y=-24 4x=36 x=9,y=14
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
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3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
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:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12)
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
数学书解方程组{2(x+y)-(x-y)=3,(x+y)-2(x-y)=1
一道二元一次方程组!3(x+y)-4(x-y)=4,(x+y)/2+(x-y)/6=1