Question

小学数学题 请教

[X(1-20%)-27]＊（1-10％）＝1／2X
正确答案是115 但过程是什么

Answer 1

[80%x-27]*90%=0.5x
[0.8x-27]*0.9=0.5x
0.8x*0.9-27*0.9=0.5x
0.72x-24.3=0.5x
0.72x-0.5x=24.3
0.22x=24.3
x=24.3/0.22
x=110又5/11

Answer 2

(0.8x-27)*0.9=0.5x
0.72x-24.3=0.5x
0.22x=24.3
x=110又5/11

Answer 3

0.8x-27)*0.9=0.5x
0.72x-24.3=0.5x
0.22x=24.3
x=110又5/11

Answer 4

(0.8x-27)*0.9=0.5x
0.72x-24.3=0.5x
0.22x=24.3
x=110又5/11

Answer 5

haoxiangshi
(0.8x-27)*0.9=0.5x
0.72x-24.3=0.5x
0.22x=24.3
x=110又5/11