Question

what should be added to 4a+7b-3c to obtain 3a-4b+6c​

Answer 1

Answer:

Let the number be x

4a + 7b - 3c + x = 3a - 4b + 6c

x = 3a - 4a - 4b - 7b + 6c + 3c

x = 9c - 11b - a