八年级---解2元一次方程组 1.4x+3y=24 5x-y=30 2.5x+3y=8 7x-3y=4
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
5(x+y)+3(x-y)=90 5(x+y)-3(x-y)=30,解二元一次方程组
解二元一次方程组{3(x+y)-4(x-y)=4,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
解二元一次方程组x/4+y/3=7,x/3+y/2=8
解二元一次方程组 x+y=3 1/2(x+y)-3y=5
解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3
一道二元一次方程组!3(x+y)-4(x-y)=4,(x+y)/2+(x-y)/6=1
解二元一次方程组(x+3)(y+5)=(x+1)(y+8),(2x-3)(5y+7)=2(5x-6)(y+1)
解下列方程组 1.4x+3y=24 5x-y=30 2.5x+3y=8 7x-3y+4
解二元一次方程组:{2x-5y=7 (x-y)/3=(x+y)/2