Checking Solutions

Checking Solutions

Introduction

After solving an equation, checking the solution by substituting it back into the original equation confirms whether the answer is correct. This verification step ensures accuracy and helps catch any errors made during solvi...

Imagine you are buying 2 gifts for a birthday party. Each gift costs the same amount, and there is a one-time gift wrapping fee of 4 dollars. The total bill is 28 dollars.

You want to find the cost of one gift. Let x represent the cost of one gift. You bought 2 gifts, so the equation is 2x plus 4 equals 28.

First, subtract 4 from bot...