计算题5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)]

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计算题5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)]

计算题5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)]
计算题5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)]

计算题5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)]
5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)]
=5a-[-3b+(6c-2a-a+c)]-(9a-7b-c)
=5a-(-3b+7c-3a)-9a+7b+c
=5a+3b-7c+3a-9a+7b+c
=-a+10b-6c

5a-{-3b+[6c-2a-a+c}-[9a-7b-c]
=5a-{-3b+7c-3a}-9a+7b+c
=5a+3b-7c+3a-9a+7b+c
=-a+10b-6c