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Brain has more books than Erika.
Let Erika has number of books.
Then,Brain has and
Jasmine has triple the number of books that brain has,
Therefore, jasmine has .
Brain, Erika and Jasmine have books.
Write the equation:
Erika has plus Brain has plus Jasmine has equals Brain,Erika and
books books books Jasmine has books
Solve the equation.
(Original equation)
(Simplify)
(Add common terms)
(Subtract from each side)
(Apply additive inverse property : )
(Divide each side by )
(Cancel common terms)
Find the number of books has jasmine.
(Substitute in the equation)
(Simplify)
Therefore, jasmine has books.
Jasmine has books.
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