Answer:
26a-38c
Step-by-step explanation:
Distribute the Negative Sign:
=−7a−19c−(−12a+30c)+−1(−21a−11c)
=−7a+−19c+12a+−30c+−1(−21a)+−1(−11c)
=−7a+−19c+12a+−30c+21a+11c
Combine Like Terms:
=−7a+−19c+12a+−30c+21a+11c
=(−7a+12a+21a)+(−19c+−30c+11c)
=26a+−38c
