DoDebb5l4isaxSwatka DoDebb5l4isaxSwatka

10-03-2017
Mathematics

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Ryan is thinking of a number. When he multiplies this number by 6 and then subtracts 15 from the answer, he ends up with his original number. What number is Ryan thinking of?

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10-03-2017

6n-15=n
minus n both sides
5n-15=0
add 15 both sides
5n=15
divide both sides by 5
n=3
de number is 3

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