解方程组0.5x+0.8y=4.7 0.6x+1.2y=6.
解方程组0.5x+0.8y=4.7 0.6x+1.2y=6.
解方程组 x=3y-6 0.8(x+y)=x+y-13.6
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组:0.6x-0.5y=2.7 1.8x+y=0.6
解二元一次方程组;0.6x-0.5y=2.7,1.8x+y=0.6
解方程组:0.2X+0.3Y=4.6 0.7X-0.5Y=0.6
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(三分之x+y)+y=6,3(x+y)-y=24
解方程组 x+y+z=-7 x-y=12 x+y-z=6
解方程组x+y+根号下x+y=12 x+xy+y=23
如果方程组3x+y=k x+3y=2的解x,y
用代入法解方程组:y=3(x-y),x=2(x-y)