58.4-3x=31.
问题描述:
58.4-3x=31.
答
58.4-3x=31.4
3x=58.4-31.4
3x=27
x=9
58.4-3x=31.
58.4-3x=31.4
3x=58.4-31.4
3x=27
x=9