43

 PAGE: 131 SET: Exercises PROBLEM: 43

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)

(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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