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Kayla is given a monthly allowance. She puts 40% of the money directly into her savings account. She spends $15 at the movies with her friends. at the end of the month she has $3 left . how much is her monthly allowance ? ​

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Final answer:

To find out Kayla's monthly allowance, we need to reverse the process and solve the equation x - 15 - 0.4x = 3. Simplifying the equation, we find that Kayla's monthly allowance is $30.

Step-by-step explanation:

To find out Kayla's monthly allowance, first, we need to reverse the process. If she had $3 left at the end of the month, we need to add all her expenses and savings to that amount. We know that she spends $15 at the movies and puts 40% of her allowance into savings. Let's assume her monthly allowance is x. So, the equation becomes:

x - 15 - 0.4x = 3

Simplifying the equation, we get:

0.6x - 15 = 3

0.6x = 18

x = 18 / 0.6

x = 30

Therefore, Kayla's monthly allowance is $30.

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