Lesson 561 of 1524
Solving Linear Equations and Inequalities
To Determine Whether a Number is a Solution to an Equation Step 1.
Practice this chapterTo Determine Whether a Number is a Solution to an Equation Step 1. Substitute the number in for the variable in the equation
If it is not true, the number is not a solution
Number — a Solution to an Equation Step 1. conditional equation — An equation that is true for one or more values of the variable and false for all other values of the variable is a conditional equation. identity — An equation that is true for any value of the variable is called an identity. The solution of an identity is all real numbers. contradiction — An equation that is false for all values of the variable is called a contradiction. A contradiction has no solution.
Worked example
What does “Number” mean in Solving Linear Equations and Inequalities?
- 1Use the wording this chapter gives for Number.
- 2The book says: a Solution to an Equation Step 1.
- 3Do not use the meaning of conditional equation. That term means An equation that is true for one or more values of the variable and false for all other values of the variable is a conditional equation.
Result: a Solution to an Equation Step 1
Why. That is the meaning this chapter gives for Number.
Do not swap Number and conditional equation. Number means a Solution to an Equation Step 1. conditional equation means An equation that is true for one or more values of the variable and false for all other values of the variable is a conditional equation.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.