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Given the function f(x) = 2x + 1, find x if f(x) = 15.
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Given the function f(x) = 2x + 1, find x if f(x) = 15.

User Abdulrahman Hassoun
by
4.8k points

2 Answers

3 votes

Answer:

x = 7

Explanation:

15=2x+1

2x+1=15

2x+1−1=15−1

2x=14

2x /2 = 14 /2

x = 7

User Trevan Hetzel
by
5.8k points
4 votes

Let y = f(x)


y = 2x + 1

When y=15


15 = 2x + 1 \\ 2x = 15 - 1 \\ 2x = 14 \\ x = 7

Therefore, x = 7 when f(x)=15

User Prasanth S
by
5.4k points
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