x represents the number of dressers he will build each month.
y represents the number of dressers he will paint each month.
The number before x and y represents the time taken to complete the task.
The answer to the equation is the limit of hours to his working time,
where 7x + 2y < 135
can be written as
7 hours (x) + 2 hours (y) < 135 hours
Match the discription with the choices of answer.
Answer is D.