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

How Can I Use The 5D Process To Solve This class=

Sagot :

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

[tex]y=4x+23[/tex]

Part B. Solve the equation.

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

[tex]87=4x+23[/tex]

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

[tex]\begin{gathered} 87-23=4x \\ 64=4x \end{gathered}[/tex]

or equivalently,

[tex]4x=64[/tex]

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

[tex]\begin{gathered} x=\frac{64}{4} \\ x=16 \end{gathered}[/tex]

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

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