Open up the brackets

Collect like terms

Simplify


Therefore, your answer is 12.
Answer:
Step-by-step explanation:
The answer is C
I'm assuming there is a graph with both functions plotted. The solution would be the point at which these two functions intersect. That coordinates of x and y for that point will yield the solutions for x and y that solve the system of equations.
X + 3 (3) will be the answer