48-x=23.

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48-x=23.

48-x=23.
48-x=23.

48-x=23.
x=48-23.8
x=24.2

x=48-23.8
x=24.2

X=48-23.8 X=24.2

呃,这是问题么?
太简单了啊
x=48-23.8=24.2

x=48-23.8=24.2

48-x=23.8,两边同时减去23.8,48-x-23.8=23.8-23.8,得到24.2-x=0,所以x=24.2