Question

subtract the sum of 3a-5b+5c and -6a+7b-9c from a-b-c​

Answer 1

Answer:

(-8a+11b-15c)

Step-by-step explanation:

(a-b-c)-(3a-5b+5c)-(-6a+7b-9c)

= (a-b-c)-(3a+6a-5b-7b+5c+9c)

= (a-b-c)+ (-9a+12b-14c)

= (-8a+11b-15c)

Answer 2

Answer:

4a-3b+3c

Step-by-step explanation:

sum of 3a-5b+5c and -6a+7b-9c

(3a-5b+5c)+(-6a+7b-9c)

=3a-5b+5c-6a+7b-9c

=-3a+2b-4c

(a-b-c​) - (-3a+2b-4c)

=a-b-c​+3a-2b+4c

=4a-3b+3c