Ruben bought six new books for his collection. This increased his collection by 12%. How many books did he have before his purchases?

Question

Mathematics

Moses Vincent

27 March, 01:19

Ruben bought six new books for his collection. This increased his collection by 12%. How many books did he have before his purchases?

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Answers (1)

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Ali Rodriguez · Answer 1

20. Let x represent the amount of books he had:

x + 6 = 1.12x

Subtract x from both sides:

6 = 0.12x

Divide both sides by 0.12; x = 50

28. $6 + 0.025*$6 = $6 + $0.15 = $6.15