Question

find B-C. 2A-C
please find​

Answer 1

Answer:

8b - 2c + 3d - a

23b - 21c + 12d - a

Step-by-step explanation:

A = 12b - 10c+ 6d

B = 9b - c + 3d

C = a + b + c

B - C

=> 9b - c + 3d - ( a + b + c )

=> 9b - c + 3d - a - b - c

=> 8b - 2c + 3d - a

2A - C

= > 2 ( 12b - 10c+ 6d ) - ( a + b + c )

=> 24b - 20c + 12d - a - b - c

=> 23b - 21c + 12d - a