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$Given $\delta(x) = 3x + 8$ and $\phi(x) = 8x + 7$, what is $x$ if $\delta(\phi(x)) = 7$?$

Guest Nov 14, 2014

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Best Answer

+128448

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We have

3[8x + 7 ] + 8 = 7 simplify

24x + 21 + 8 = 7

24x + 29 = 7 subtract 29 from both sides

24x = -22 divide both sides by 24

x = -22/24 = -11/12

CPhill Nov 14, 2014

1⁺⁰ Answers

+128448

+5

Best Answer

We have

3[8x + 7 ] + 8 = 7 simplify

24x + 21 + 8 = 7

24x + 29 = 7 subtract 29 from both sides

24x = -22 divide both sides by 24

x = -22/24 = -11/12

CPhill Nov 14, 2014

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