the sum of two factors of 48 is nineteen. the larger factor, x, is one more than five times the smaller factor, y. which system of equations can be used to find the numbers
a. x = 19 - y
x = 5y +1
b. x = 19 + y
y = 5x + 1
c. x = y + 19
y = 5x -1
d. x = y - 19
x = 5y +1