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VladimirAG [237]

3 years ago

6

You and a friend went to Glory Days for dinner. You ordered a cheeseburger for $8.50 and a soda for $1.99. Your friend convinced

you to share and split the cost of onion rings that cost $7.00. How much did you spend on your dinner?

1 answer:

SpyIntel [72]3 years ago

6 0

Answer:

$13.99

Step-by-step explanation:

that's the burger and pop and half the onion rings cost combined

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For this case we must solve the following system of equations:

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To solve we follow the steps below:

We multiply the second equation by -3:

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Thus, we have the equivalent system:

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We add the equations:

$3x-6x-3y + 3y = -3 + 15\\-3x = -3 + 15\\-3x = 12\\x = \frac {12} {- 3}\\x = -4$

We look for the value of the variable "y":

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Thus, the solution of the system is given by:

$(x, y): (- 4, -3)$

Answer:

$(x, y): (- 4, -3)$

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