b=80-c
a=98-c
(80-c)+98-c=88
178-2c=88
c=45
a=53
b=33
a+b=88 b+c=80 c+a=98 求a=?b=?c=?
a+b=88 b+c=80 c+a=98 求a=?b=?c=?
数学人气:185 ℃时间:2020-01-14 13:16:46
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