Download Unit 2 Study Guide

Algebra I
Unit 2 Study Guide
1) Solving One-Step Equations
Do the opposite
2) Solving Two-Step Equations
Add/Subtract THEN Multiply/Divide
Ex:
x + 7 = 10
Ex:
Ex:
5n = -40
Ex:
3) Solving Multi-Step Equations
Ex:
Ex:
2n + 7 = -21
n
 4  7
8
4) Solving Literal Equations
Get the identified letter by itself
3(m - 4) = 5(m + 2)
5p – 6 + p = 14 – 2p
Ex:
A = LW for L
Ex:
4x + 4y = 20 for y
Algebra I
5) JUSTIFY your answer
Ex:
2n + 7 = -21
-7 = -7
2n = -28
n = -14
6) Write an equation and solve
Ex: A state park charges admission of $6 per
person plus $3 for parking. Jo paid $27 when her car
entered the park. Write and solve an equation to find
the number of people in Jo’s car.
JUSTIFY:
(substitute your solution in the equation and prove that
it “works”)
Ex: Costs for bowling at Blue Oaks bowling alley are
$2.50 for shoes and $4.25 for each game bowled.
Austin bowled 5 games. What was his total cost to
bowl?
7) Steps for Solving Equations
1.
2.
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4.
5.