(1)化简:5a+(4b-c)-3(a+3b-2c)
问题描述:
(1)化简:5a+(4b-c)-3(a+3b-2c)
答
5a+(4b-c)-3(a+3b-2c)
=5a+4b-c-3a-9b+6c
=2a-5b+5c