2x-y=30,30%x+20y%y=8解方程组
解方程组 {2x-y-30=0 {30%x=20%y=8
解方程组:x/2+y/3=1 x*20%+y*30%=14*10%
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
已知方程组4x+2y=1,20x+8y,求x,y
5(x+y)+3(x-y)=90 5(x+y)-3(x-y)=30,解二元一次方程组
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3
解方程组 x+2y=1.5,12(x+y)+15y=20
解方程组:根号(x+1/y)+根号(x+y-3)=3 2x+y+1/y=8
解方程组 x+y=1 20%x+30%y=25%x2
x+y=30与8x+5y=198的方程组怎么解?
解方程组:2x+2Y=30,2X+4Y=44