There are 850 Douglas fir and ponderosa pine trees in a?

There are 850 Douglas fir and ponderosa pine trees in a


section of forest bought by Sawz Logging Co. The company paid an average of


$300 for each Douglas fir and $225 for each ponderosa pine. If the company paid


$217,500 for the trees, how many of each kind did the company buy?

There are 850 Douglas fir and ponderosa pine trees in a?
300x + 225y = 217500


x + y = 850





x = 850 - y





Solve for Ponderosa Pine





300(850 - y) + 225y = 217500


255000 - 300y + 225y = 217500


-75y = - 37500


y = 500





Solve for Douglas Fir





x + y = 850


x + 500 = 850


x = 350
Reply:4 of 1, 3 of the other.