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28 votes
did she14. Jillian sold half of her comic books and then bought15 more. She now has 30. With how manybegin?Let c represent the number of comic books with whichshe began.Equation or inequality:Jillian began withCDs.

User Rich Armstrong
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1 Answer

10 votes
10 votes

Step 1:

Given data

Let c represent the number of comic books with which she begin.

When sh sold half of her comic books

Then, she will be left with


(c)/(2)\text{ comic books}

When she bought 15 more, she now has 30.

15 more, mean you add 15 to c/2 then equate it to 30.

Next, write an equation.


(c)/(2)\text{ + 15 = 30}

Step 2:

Solve the linear equation to find the value of c.


\begin{gathered} (c)/(2)\text{ + 15 = 30} \\ \text{Collect like terms} \\ (c)/(2)\text{ = 30 - 15} \\ (c)/(2)\text{ = 15} \\ \text{cross multiply} \\ c\text{ = 15 }*\text{ 2} \\ c\text{ = 30} \end{gathered}

Step 3:

Final answer


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User Condit
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