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Triss [41]
3 years ago
6

Given f(x) = 2x + 9, if f(x) = 15, find x.​

Mathematics
1 answer:
AleksandrR [38]3 years ago
4 0

Answer:

<h2>x = 3</h2>

Step-by-step explanation:

f(x)=2x+9\\\\\text{Substitute}\ f(x)=15:\\\\15=2x+9\qquad\text{subtract 9 from both isdes}\\\\15-9=2x+9-9\\\\6=2x\qquad\text{divide both sides by 2}\\\\\dfrac{6}{2}=\dfrac{2x}{2}\\\\3=x\to x=3

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Troyanec [42]
Hello!

With inequalities are solved just like equations. I will solve both below.

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Hope this helps!
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svlad2 [7]

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Svetradugi [14.3K]

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Step 2: Subtract 8 from both sides.

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