The sum of two numbers is 28. The first number, x, is three times the second number, y.
A
A system of equations. x plus y equals 28. x equals 3 plus y.
B
A system of equations. x y equals 28. x equals 3 y.
C
A system of equations. x y equals 28. x equals 3 plus y.
D
A system of equations. x plus y equals 28. x equals 3 y.