SOLUTION: A class of 165 students went on a field trip they took 9 vehicles some were cars and some were buses find the number of cars and the number of buses they took if each car holds 5 s

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A class of 165 students went on a field trip they took 9 vehicles some were cars and some were buses find the number of cars and the number of buses they took if each car holds 5 s      Log On


   

Question 1026092: A class of 165 students went on a field trip they took 9 vehicles some were cars and some were buses find the number of cars and the number of buses they took if each car holds 5 students and each bus holds 45 students
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = number of buses they took
+9+-+x+ = number of cars they took
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+45x+%2B+5%2A%28+9+-+x+%29+=+165+
+45x+%2B+45+-+5x+=+165+
+40x+=+120+
+x+=+3+
and
+9+-+x+=+6+
They took 3 buses and 6 cars
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check:
+3%2A45+=+135+
+6%2A5+=+30+
+135+%2B+30+=+165+
OK