已知2x+y/2=5x+2y/4=1求x+2y+1/2x-5y+7

问题描述:

已知2x+y/2=5x+2y/4=1求x+2y+1/2x-5y+7

应该是〔2x+y〕/2=〔5x+2y〕/4=1,求[x+2y+1]/〔2x-3y+7〕的值
4x+2y=4,5x+2y=4
x=0,y=1
[x+2y+1]/〔2x-3y+7〕=1