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How can I use the 5-D Process to solve this?

How can I use the 5-D Process to solve this?-example-1
User Rlar
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1 Answer

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Part A. Define the variables and the equation.

Let y be the money Ling wants to save and x be the weeks, then we can write


y=4x+23

Part B. Solve the equation.

Since Ling wants $87, then y=87. By substituting this value into the last equation, we get


87=4x+23

then, by moving 23 to the left hand side, we have


\begin{gathered} 87-23=4x \\ 64=4x \end{gathered}

or equivalently,


4x=64

Finally, by moving 4 to the right hand side, we obtain


\begin{gathered} x=(64)/(4) \\ x=16 \end{gathered}

Then, How long will it take her to get enough money to buy the tickets? 16 weeks

User Kwadwo
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