2 years ago

= 3 and 1/2 × 3 and 1/2

Mathematics

1 answer:

bixtya [17]2 years ago

7 0

Step-by-step explanation:

please mark me as brainlest

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Answer:

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Step-by-step explanation:

We use casework on when $3x-9=12$ and when $3x-9=-12$ .

For the first case, $3x-9=12$ , we add 9 to both sides to get

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For the second case, $3x-9=-12$ , we add 9 to both sides to get

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Checking both cases, we plug in $x=7$ and $x=-1$ .

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For the second case, we have $|3(-1)-9|=|-3-9|=|-12|=12$ , which also satisfies the equation.

This gives us two solutions to the equation; $x=7$ and $x=-1$ .

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Step-by-step explanation:

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