用加减消元法解:3(x-1)=y+5,5(y-1)=3(x+5)
加减消元法解方程3X(X-1)=Y+5 5(Y-1)=3(X+5)
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
用加减消元法(1)2x-y=8 2x+5y=-4 (2)2x+5y=17 2x-3y=1 (3)x-y=5 2x+3y-
用加减消元法解方程组 3(x-1)=y+5 2(y+1)=x+1
解方程组:2x-3y=1 4x+7y=5(用加减消元法)
用加减消元法解下列方程组:(1)3x-5y=-7 7x+6y=19
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
用加减消元法:解方程组:(1)x+y=4 2x−y=5 (2)3x+2y=7x+2y=5(3)2x+y=-2
加减消元法解方程组:{3x-7y=1 {5x-4y=17
加减消元法解方程组:4x-y=9,3x+5y=1
用加减消元法解二元一次方程组:①[(x+y)/2]+[(x-y)/3]=5②[(x+y)/2]+[(x-y)/3]=-1
4(x+2y)=12,3x=5+2y(加减消元法)