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# One-Step Equations and Inverse Operations

## Add and subtract like terms as a step to solve equations.

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Solving One Step Equations

### Vocabulary Language: English

constant

constant

A constant is a value that does not change. In Algebra, this is a number such as 3, 12, 342, etc., as opposed to a variable such as x, y or a.
Equation

Equation

An equation is a mathematical sentence that describes two equal quantities. Equations contain equals signs.
Inverse

Inverse

Inverse operations are operations that "undo" each other. Multiplication is the inverse operation of division. Addition is the inverse operation of subtraction.
linear equation

linear equation

A linear equation is an equation between two variables that produces a straight line when graphed.
Numerical Coefficient

Numerical Coefficient

In mathematical expressions, the numerical coefficients are the numbers associated with the variables. For example, in the expression $4x$, 4 is the numerical coefficient and $x$ is the variable.
reciprocal

reciprocal

The reciprocal of a number is the number you can multiply it by to get one. The reciprocal of 2 is 1/2. It is also called the multiplicative inverse, or just inverse.
Variable

Variable

A variable is a symbol used to represent an unknown or changing quantity. The most common variables are a, b, x, y, m, and n.