I believe this is the answer.
Answer:
21
Step-by-step explanation:
The pattern is going up by 3s
We need to solve the following system by substituition:

To solve by substituition means that we need to isolate one variable in one of the equations and replace one expression with the other. This is done below:

Then we need to replace the value of "x" in any of the two equations.

The solution is (-3,-5).

because when you add 1768 and 978 it would equal $2746 so the total between the both is 2746 so your answer is 2746
Plz help. ,,, ,,,,,,,,,,,,,,........
il63 [147K]
6. 3x - 3
7. -2b + 12
8. 2y-12