Question

subract 4a-2b+3c-9and-3b+4c from the sum of 6b-6c+12and a-b+c-

Answer 1

6b-6c+12+a-b+c
=a+5b-5c+12

let subtract
a+5b-5c+12-4a-2b+3c-9
a-4a+5b-2b-5c+3c+12-9
-3a+3b-2c+3

let subtract another
a+5b-5c+12+3b+4c
a+5b+3b-5c+4c+12
a+8b-c+12

Answer 2

-3a+6b-6c+12+a-b+c-4a+2b-3c+9+3b-4c= -3a+10b-12c+21