An algebra problem by aman joshi
Algebra
Level
2
In a parking lot there are some cars and some bikes. If there are total 70 vehicles and 200 wheels altogether, find number of bikes.
40
35
30
50
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1 solution
Let x = # of cars, y = # of bikes. Then x + y = 70, 4x + 2y = 200, or 2x + y = 100. Subtracting, x + 30. so y = 40.