Review - One-Step, One-Variable Equations and Inequalities

A one-step equation is an equation that can be solved in a single step by performing the same operation on both sides to isolate the variable.

$$x = 7$$ .

It means that the value of x is less than 5.

Add 4 to both sides: $$x > 6$$ .

An equation states that two expressions are equal, while an inequality shows the relationship between expressions that are not necessarily equal.

$$x = 4$$ .

It indicates that x can be -3 or any number greater than -3.

Draw a number line, place an open circle on 7, and shade to the left.

$$x = 19$$ .

It means that x can be any number greater than -2, represented by an open circle at -2 and shading to the right.