Question

What should be added to 7a – 9b + 10c to get 9a + b – 3c.

Answer 1

Answer:

13

Step-by-step explanation:

= 7a - 9b + 10c + 9a + b - 3c

= 7-9 + 10 + 9-3

= -3 + 10 + 6

= -3 + 16

= -13 This is answer