解方程组 (5+1)/5=(y-3)/2① 3x+4y=32②
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
解方程组 (5+1)/5=(y-3)/2① 3x+4y=32②
解方程组:①4x+3y-5=0,x-2y-4=0.②5x-2=2(y-1),2(x-2)+(y-1)③0.2x+0.5y
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
解方程组(1)2x-3y=10,-4x+y=5 (2)3x-2y=15,5x-4y=23
解方程组(x/2-y/5=4①,x/7-y/15=3②)
用加减法解方程组①2x-5y=(-26) ②3x+4y=7
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
2+3x/5+4y=9,4+6y-y=1解方程组
解下列方程组:①{3x+5y+42,x/2=y/3.②{x+y/5=x-y/3=2.③3(x-1)-4(y-4)=0,5
解二元一次方程组 x+y=3 1/2(x+y)-3y=5
解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)