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Sixth, seventh, and eighth graders took part in the school trip. Sixth graders were 5 more than seventh graders, and eighth graders were 3 less than sixth graders. How many sixth graders were on the trip if there were 73 students in total?

Correct answer:

a =  27

Step-by-step explanation:

a+b+c=73 a = 5+b c = a3  a+(a5)+(a3)=73  3a=81  a=381=27  a=27   Verifying Solution:  b=a5=275=22 c=a3=273=24  s=a+b+c=27+22+24=73

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