Observed 8276

We observed road traffic. We only saw bikes and cars. There were a total of 40 laps on the road. List at least three options how many bikes could be and how many cars?

Correct answer:

n =  11

Step-by-step explanation:

4a+2b=40  a0=0,b0=20 a1=1,b1=18 a2=2,b2=16 a3=3,b3=14 a4=4,b4=12 a5=5,b5=10 a6=6,b6=8 a7=7,b7=6 a8=8,b8=4 a9=9,b9=2 a10=10,b10=0  n=11

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