“求某数”答案(巧填妙算系列题)
奥数网
2010-01-06 14:42:29
25.求某数
(1)设某数为x
5x+27=8x
8x-5x=27
x=9
(2)设某数为x
4(x-3)=2x+36
4x-12=2x+36
4x-2x=36+12
2x=48
x=24
25.求某数
(1)设某数为x
5x+27=8x
8x-5x=27
x=9
(2)设某数为x
4(x-3)=2x+36
4x-12=2x+36
4x-2x=36+12
2x=48
x=24