(x+3y)/2=3/5与5(x-2y)=-4这题帮帮忙
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(x+3y)/2=3/5与5(x-2y)=-4这题帮帮忙(x+3y)/2=3/5与5(x-2y)=-4这题帮帮忙(x+3y)/2=3/5与5(x-2y)=-4这题帮帮忙(x+3y)/2=3/5,则x+
(x+3y)/2=3/5与5(x-2y)=-4这题帮帮忙
(x+3y)/2=3/5与5(x-2y)=-4这题帮帮忙
(x+3y)/2=3/5与5(x-2y)=-4这题帮帮忙
(x+3y)/2=3/5,则x+3y=6/5①
5(x-2y)=-4,则x-2y=-4/5②
①-②,得5y=2,则y=2/5
代入①,解得x=0
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
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x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
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3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
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化简:5(x-y)+2(x+y)-3(x-y)
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
把(X-Y)和(X+Y)各看作一个字母因式,合并同类项3(X+Y)²-(X-Y)+2(X+Y)²+(X-Y)-5(X-Y)²=2在后面是²,2在前面是与后面相乘.
3x+y+5与2-4y+2x是同类项,求x,y
若|x-y-5|与|2x+3y-15|互为相反数,则x+y=?
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(2x-3y)-(5x-y)