For f(x)=3x+4, find f(2) and find x such that f(x)=17

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02-05-2014
Mathematics

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For f(x)=3x+4, find f(2) and find x such that f(x)=17

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Lilith Lilith · Answer 1 · 2014-05-02T15:28:40-04:00

Lilith Lilith

02-05-2014

[tex] f(x)=3x+4 \\ \\ f(2) =3x+4 = 3\cdot 2+4 =6+4 =10 \\ \\ \\ f(x)=17 \\ \\17=3x+4 \ \ |-4 \\ \\3x+4-4 = 17-4\\ \\ 3x = 13 \ \ /:3 \\ \\x=\frac{13}{3}\\ \\x=4\frac{1}{3}[/tex]

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