Question

A first grade class has 6-year olds and 7-year olds. There are 13 children in the class, and the total of their ages is 83. Which system of linear equations represents the problem?

seven x plus six y equals thirteen x plus y equals eighty-three

six x plus seven y equals eighty-three x plus y equals thirteen x

six x plus seven y equals thirteen x plus y equals eighty-three x

seven x plus six y equals eighty-three x plus y equals thirteen

Answer 1

6x + 7y = 83

x + y = 13

Answer 2

Option 'd'