9th-grade 5864

9th-grade students were marked
28 students. ... .1
25% of students. ..2
40% of students. ..3
How many students were there in the 9th grade?

Correct answer:

n =  80

Step-by-step explanation:


28+25/100n+40/100n=n

28+25/100·n+40/100·n=n

35n = 2800


n = 2800/35 = 80

n = 80

Our simple equation calculator calculates it.



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