已知10y=7.5x,请问10y-7x=y+3.14,问x-y=几
问题描述:
已知10y=7.5x,请问10y-7x=y+3.14,问x-y=几
答
y=0.75x7.5x-7x=0.75x+3.145x=7.5x+31.4-2.5x=31.410 y-2.5x=31.4+10y...
已知10y=7.5x,请问10y-7x=y+3.14,问x-y=几
y=0.75x7.5x-7x=0.75x+3.145x=7.5x+31.4-2.5x=31.410 y-2.5x=31.4+10y...