♥B)a - 6b + 4c
♥First you need to distribute the Negative Sign.
=a+−1(5b−(a−(3b−2c)+c−(a−2b−c)))
=a+−1(5b)+−1(−a)+−1(3b)+−1(−2c)+−1(−c)+−1a+−1(−2b)+−1(−c)
=a+−5b+a+−3b+2c+c+−a+2b+c
♥Now you need to Combine Like Terms:
=a+−5b+a+−3b+2c+c+−a+2b+c
=(a+a+−a)+(−5b+−3b+2b)+(2c+c+c)
=a+−6b+4c
♥and you get your final answer: a−6b+4c
