Question

Simplify: (a+b-3c)+ (a− 3b + c)+(-3a+b+c)-3(a+b+c)
method​

Answer 1

Answer:

-4a-4b-4c

Step-by-step explanation:

(a+b+3c)+(a-3b+c)+(-3a+b+c)-3(a+b+c)

=a+b+3c+a-3b+c-3a+b+c-3a-3b-3c

=a+a-3a-3a+b+b-3b-3b+c+c-3c-3c

=2a-6a+2b-6b+2c-6c

=-4a-4b-4c