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10 votes
10 votes
I just need to know the answer quickly because I have to go somewhere

I just need to know the answer quickly because I have to go somewhere-example-1
User Tukaef
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1 Answer

25 votes
25 votes

Given the function:


\begin{gathered} f(x)=2x-5\rightarrow(1) \\ \\ f(x)=15\rightarrow(2) \end{gathered}

We will substitute with the value of f(x) from equation (1) into equation (2), then solve for x as follows:


\begin{gathered} 15=2x-5 \\ 15+5=2x \\ 20=2x \\ (20)/(2)=x \\ \\ x=10 \end{gathered}

So, the answer will be x = 10

User Han Arantes
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2.6k points