Final answer:
To solve the system of equations, substitute the value of y from the second equation into the first equation and solve for x. The solution is (-1/5, 5).
Step-by-step explanation:
To solve the system of equations, we need to substitute the value of y from the second equation into the first equation and solve for x:
3y = 15 ---> y = 5
Substituting y = 5 into the first equation:
5x + 2(5) = 9
5x + 10 = 9
5x = -1
x = -1/5
Therefore, the solution to the system of equations is (-1/5, 5).