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# 7.2: Systems Using Substitution

Difficulty Level: Basic Created by: CK-12
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Practice Systems Using Substitution

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### Vocabulary Language: English Spanish

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

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

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

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

substitute

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

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Difficulty Level:
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