化简:a-[b-2a-(a-b)]

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化简:a-[b-2a-(a-b)]

化简:a-[b-2a-(a-b)]
化简:a-[b-2a-(a-b)]

化简:a-[b-2a-(a-b)]
a-[b-2a-(a-b)]
=a-[b-2a-a+b]
=a-(2b-3a)
=a-2b+3a
=4a-2b

原式=a-[b-2a-a+b]
=a-[2b-3a]
=a-2b+3a
=4a-2b

a-[b-2a-(a-b)]
=a-[b-2a-a+b]
=a-b+2a+a-b
=4a-2b

=a-[b-2a-a+b]
=a-[2b-3a]
=a-2b+3a
=4a-2b