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dangina [55]
3 years ago
8

Twice a number is three more than nine​

Mathematics
2 answers:
antoniya [11.8K]3 years ago
8 0

answer: how we supposed to do it?

Step-by-step explanation:

i don't even understand

KonstantinChe [14]3 years ago
5 0

Answer:

6

Step-by-step explanation:

Let that number be <em>x</em>.

2x = 9 + 3

2x = 12

x = 6

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Step-by-step explanation:

The equations need to match the problem statements. If we let C and S represent the costs of Cherry and Sweet potato pies, respectively, then the revenue from each sale can be expressed as an equation.

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Note that we have used C and S in the second equation in the same order as they appeared in the first equation, even though the problem statement has that order reversed. This facilitates solving the equations using elimination or Cramer's rule.

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The cost of a cherry pie can be found by eliminating S from the equations. We can do that by subtracting twice the first equation from the second:

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