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# 7.2: Systems Using Substitution

Difficulty Level: Basic Created by: CK-12
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Substitution Property of Equality

Substitution Property of Equality

If $y=$ an algebraic expression, then the algebraic expression can be substituted for any $y$ in an equation or an inequality.
Consistent

Consistent

A system of equations is consistent if it has at least one solution.
distributive property

distributive property

The distributive property states that the product of an expression and a sum is equal to the sum of the products of the expression and each term in the sum. For example, $a(b + c) = ab + ac$.
linear equation

linear equation

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

substitute

In algebra, to substitute means to replace a variable or term with a specific value.

Basic

8 , 9

Feb 24, 2012

Feb 26, 2015