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Welcome to Doct Maths GRE Math Practice! In this video, we'll show you how to tackle Substitution Questions using the Plugging in the Answers (PITA) strategy. Substitution Questions test your ability to solve or manipulate algebraic expressions, often involving variables. PITA simplifies these challenging questions by eliminating the need for complex algebra.
We'll walk you through an example problem where Vicken, Roger, and Adam went to buy a $90 radio. Roger agrees to pay twice as much as Adam, and Vicken agrees to pay three times as much as Adam. Using PITA, we'll find out how much Roger must pay.
In this video, you'll learn:
• How to identify when to use the PITA strategy
• The steps to effectively plug in answer choices
• Tips to save time and avoid common pitfalls
• Why starting with the middle answer choice is often the best approach
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