Algebra I

• equation- mathematical statement with a = sign
• open sentence- a statement with 1 or more variables
• solution- number that makes an open sentence true, the replacement value, any number(s) that produces a true statement when it is substituted for a variable in an equation or inequality (ex. x<5,>
• checking a solution- substituting the number into the equation to see if it makes the statement true
• replacement set- a set of #'s to substitute a variable
• set- a collection of numbers
• element- each member (number) of a set
• solution set- element that's true

Applying the distributive property-

3(7-5)=3x7-3x5