求方程组0.5x+0.8y=4.7 0.6x+0.12y=6.6
解方程组0.5x+0.8y=4.7 0.6x+1.2y=6.
已知方程组4x+2y=1,20x+8y,求x,y
求x+y/3+x-y/2=6 3(x+y)-2(x-y)=28方程组的解
已知x、y满足方程组3x+y=2013,x+3y=2012,求x-y
已知方程组{2x+y=6 x+2y=9},求x+y与x-y的值
已知方程组{2x+y=6,x-3y=1,不解方程组,求7y(x-3y)²-(3y-x)²的值.
已知方程组2X+Y=6和X-3Y=1不解方程组,求7Y(X-3Y)^2-(3Y-X)^3
已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+
解方程组 x=3y-6 0.8(x+y)=x+y-13.6
已知二元一次方程组0.2x+0.1y=0.7,0.1x+0.2y=0.8,求x-y和x+y的值
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