Given that f(x)=2x-5, find the value of x that makes f(x)=15
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x = 10

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

FunctionsFunction Notation

Step-by-step explanation:

Step 1: Define

f(x) = 2x - 5

f(x) = 15

Step 2: Solve for x

Substitute in f(x) [Function]:                                                                             15 = 2x - 5[Addition Property of Equality] Add 5 on both sides:                                    20 = 2x[Division Property of Equality] Divide 2 on both sides:                                  10 = xRewrite:                                                                                                             x = 10

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