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Variable/Problems

From AoPSWiki

Contents

1 Preintroductory
- 1.1 P1
  - 1.1.1 Problem
  - 1.1.2 Solution
2 Introductory
3 Intermediate
4 Olympiad

Preintroductory

P1

Problem

What number, when added to $7$ , gives a sum of $10$ ?

Solution

We set up the equation: $x+7=10\Rightarrow x+7-7=10-7\Rightarrow x=\boxed{3}$

Introductory

Intermediate

Olympiad

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