Megan has x story books. Gemma has twice as many story books as Megan. Kate has 7 fewer story books than Gemma.
( With formula )
(a) Express the total number of story books that Gemma and Kate in terms of x.
(b) If Megan has 12 story books, find the total number of story books that Gemma and Kate have.
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Answer:
a)books with megan=x
books with gemma=2x
books with kate=2x-7
b)books with megan=x
books with megan=12
books with gemma=2x
2x=12×2
=24
books with kate=2x-7
2x-7= 2×12-7
=24-7
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