设二角,五角分别有x,y,
则一元的有37-x-y张
2x+5y+10(37-x-y)=139
x:(5y)=4:5
化简得
8x+5y=231;
x=4y
即8*4y+5y=231
37y=231
y没整数解y=6.2432
题是不是错了
37y=231;
设二角,五角分别有x,y,
则一元的有37-x-y张
2x+5y+10(37-x-y)=139
x:(5y)=4:5
化简得
8x+5y=231;
x=4y
即8*4y+5y=231
37y=231
y没整数解y=6.2432
题是不是错了
37y=231;