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# I Would Like Help With This... Math Problem

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42
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+57

Let f(x)=2x-3 For what value of x is (f(f(x)) = x?

Jan 4, 2021

#1
+112009
+3

Let f(x)=2x-3 For what value of x is (f(f(x)) = x?

$$f(x)=2x-3\\ so\\ f(f(x))=2(2x-3)-3\\ \text{so when does}\\ 2(2x-3)-3=x$$

well you will have to solve it to find out ;)

Jan 4, 2021

#1
+112009
+3

Let f(x)=2x-3 For what value of x is (f(f(x)) = x?

$$f(x)=2x-3\\ so\\ f(f(x))=2(2x-3)-3\\ \text{so when does}\\ 2(2x-3)-3=x$$

well you will have to solve it to find out ;)

Melody Jan 4, 2021
#2
+57
+2

The Answer is 3!

Thank You!

JoLink  Jan 4, 2021