Substitution and Order of Operations

Substitution and Order of Operations

Math Practices - 3/3/21

Steps for 1 variable expressions

• Replace variable (letter/symbol) with number

• Simplify by following order of operations

Substitution with 2 variables

• Replace variable (letter/symbol) with number

• Simplify by following Order of Operations

• Solve the equation for unknown variable

Solving 1 and 2 step equations

• 1) distribute - Parenthesis

• 2) combine like terms on 1 side of the equation

• move all VARIABLE terms to the same side of equation by add or subtract

• UNDO add/subtract to variable

• UNDO multiply/divide to variable

Multiple Choice

 $2x-5,\ \ \ let\ x=-2$  

• One variable

• two variable