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3 years ago

A. 2x + 11 = 9x - 3 I need the steps on how to get x=2

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

6 0

Answer:

x = 2

Step-by-step explanation:

11+3 = 9x-2x

14 = 7x

x = 14/7

x = 2

Hope I helped! :)))

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Answer:

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3 years ago

I need help with this please....Thanks

IrinaK [193]

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3 years ago

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3 years ago

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frosja888 [35]

Answer:

The answer is below

Step-by-step explanation:

Let x represent the number of small hat purchased, y represent the number of medium hat purchased and z represent the number of large hat purchased.

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Also, he spent a total of $302, hence:

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Represent equations 1, 2 and 3 in matrix form gives:

$\left[\begin{array}{ccc}1&1&1\\5.5&6&7\\-3&1&0\end{array}\right] \left[\begin{array}{c}x\\y\\z\end{array}\right] = \left[\begin{array}{c}47\\302\\0\end{array}\right] \\\\\\\\ \left[\begin{array}{c}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}1&1&1\\5.5&6&7\\-3&1&0\end{array}\right] ^{-1} \left[\begin{array}{c}47\\302\\0\end{array}\right] \\\\\\ \left[\begin{array}{c}x\\y\\z\end{array}\right] = \left[\begin{array}{c}6\\18\\23\end{array}\right]$

Therefore he purchases 6 small hats, 18 medium hats and 23 large hats

5 0

3 years ago