[x+y=110,50x+40y=50(1+10%)x+40(1-15%)y]

x+y=46 40分之x+50分之y=1.求x y 求几个方程组的答案 ｛2x+y=2 {3x-y=7 x=?y=?{x+2y=50 {3x=2y+6 x=?y=?{x+y=40 {10x+8y=370 x、y=?{x+y=5.8 {y=3x+0.6 x=?y=? [x+y=110,50x+40y=50(1+10%)x+40(1-15%)y] x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 已知：x(x-50y)+xy=50y^2,求：(x-y):y=? X+Y=40,(X*Y)/(X+Y)=7.5 化简 x / y(x+y) - y / x(x+y) = 求 X Y公式X+Y=50Y/X=3X+Y=100Y/X=3求 x y...公式 x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空 x+y=50 1.5x+1.1y=50 x+y=150 1.5x+1.1y=50 X+Y=1830％X+75％Y=18*50％ x=y*20+100,x=y*25-50] x:18=y:13 x-y=50, [20y+100=x,25y-50=x] x+x+x+x+y=40 x+y= 13x=y= 2Y：30%=3X：50%求X:Y 50X+Y=100