1.方程2x+y/2=5x+2y/4=1,求x+2y+1/2x—3y+7
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1.方程2x+y/2=5x+2y/4=1,求x+2y+1/2x—3y+71.方程2x+y/2=5x+2y/4=1,求x+2y+1/2x—3y+71.方程2x+y/2=5x+2y/4=1,求x+2y+1
1.方程2x+y/2=5x+2y/4=1,求x+2y+1/2x—3y+7
1.方程2x+y/2=5x+2y/4=1,求x+2y+1/2x—3y+7
1.方程2x+y/2=5x+2y/4=1,求x+2y+1/2x—3y+7
由方程组:2x+y=2,5x+2y=4,解得:x=0,y=2
所以:(x+2y+1)/(2x-3y+7)=(4+1)/(-6+7)=5
解方程x-3y+1=2x-y=3x-2y+4
解方程x-3y+1=2x-y=3x-2y+4
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