–4(6x 3) = –12(x 10). user: the sum of two numbers is 13. two times the first number minus three times the second number is 1. if you let x stand for the first number and y for the second number, what are the two numbers? a. x = 8, y = 5 b. x = –5, y = –8 c. x = 5, y = 8 d. x = –8, y = –5