In Algebra "Substitution" means putting numbers where the letters are.

Example: What is

Answer: Put "5" where "x" is:

Example: What is

**x + x/2**when x=5?Answer: Put "5" where "x" is:

**5 + 5/2**= 5 + 2.5 =**7.5**
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Example: What is

Answer: Put "5" where "x" is:

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