Determine the equivalent system for the given system of equations.4x − 5y = 23x − y = 8a. 4x − 5y = 213x − 8y = 4b. 4x − 5y = 210x + 3y = 15c. 4x − 5y = 213x − 8y = 26d. 4x − 5y = 27x + 6y = 10