(1)化简:5a+(4b-c)-3(a+3b-2c)

问题描述:

(1)化简:5a+(4b-c)-3(a+3b-2c)

5a+(4b-c)-3(a+3b-2c)
= 5a+4b-c-3a-9b+6c
= 2a-5b+5c