Write an equation of the line passing through the point A(3,- 1) that is parallel to the line y = 1/3 x + 10

For this case, the first thing we must do is define variables.  we have then:   x: unit price of apples  y: unit price of oranges  we write the system of equations.  we have then:     the system can not be solved because it is a system with two lines that have the same slope and therefore are parallel.  rewriting the equation two we have:     therefore, the slope of both lines is:     as the lines are parallel, they do not intersect and therefore the system has no solution  answer:   we can not find a unique price for an apple and an orange.