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Neporo4naja [7]
3 years ago
7

Use the following function rule to find f(3). f(x) = 12 – 3x f(3)

Mathematics
1 answer:
Fantom [35]3 years ago
8 0

Answer:

its 4

:))))))))))))))))) enjoy

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\large\underline{\sf{Solution-}}

\sf  \longmapsto x + y = 7 \: \: - - - (i)

\sf  \longmapsto 3x - 2y = 11 \: \: - - - (ii)

<u>By first equation,</u>

\sf  \longmapsto x + y = 7

\sf  \longmapsto x = 7 - y

<u>Now, we can find the original value of y.</u>

\sf \longmapsto 3x - 2y = 11

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\sf  \longmapsto - 5y =  - 10

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<u>Now, we can find the original value of x.</u>

\sf  \longmapsto x + y = 7

\sf  \longmapsto x + 2 = 7

\sf  \longmapsto x = 7 - 2

\sf  \longmapsto x = 5

Therefore, the values of x and y are 5 and 2 respectively.

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