Simple Equations
4 = -8 + x
x= 12
Solving Equations
4x + 3 = 7
x = 1
Solve x + 5 = x + 2
No Solution
Write and solve an equation:
A student buys 4 notebooks at the same price. The total cost is $12. How much does each notebook cost?
4x = 12
$3 per notebook
Where are loaner pencils located?
In the silver tin on Mr. Elting's desk - feel free to borrow anytime!
2x + 12 = 6
x= -3
Solving Equations
4(6 + 5x) = 124
x = 5
Solve 10 - x = 4
x = 6
Write and solve an equation:
A gym charges a $12 registration fee plus $8 per month. If a student paid $52 in total, how many months did they pay for?
8x + 12 = 52
5 months
Where can you find paper assignments from a previous week?
In the air head box on the table near the door.
12/x=30/10
x = 4
Solving Equations
-108 = -8(x + 6) - 4
x = 7
Rewrite the following equation into two separate problems: |x - 5| = 2
No need to solve them.
x - 5 = 2 and x - 5 = -2
Write and solve an equation
A video game character starts with 120 health points and loses an average of 15 health points each round. After several rounds, the character has 45 health points. How many rounds have passed?
120 - 15x = 45
5 rounds
What does a yellow light in front mean?
You can only be on permitted websites during class time today.
2/5x=30
x= 75
Solving Equations
184 = 5(4a + 6) + 2a
a=7
Solve |x + 9| = 1 (find both values of x)
x = -8 and x = -10
Write an equation and solve:
Two students are collecting cans for a recycling competition. Maya starts with 18 cans and collects 7 cans each day. Jordan starts with 42 cans and collects 3 cans each day. After how many days will they have the same number of cans?
7x + 18 = 3x + 42
6 days
What is our goal statement today?
Review solving equations
Solve for a, a-b=3c
a=b+3c
Solving Equations
-93 = 5 - 7(3k + 8)
k = 2
Solve 2|x - 5| + 4 = 10
x = 8 and x = 2
Write and solve an equation:
A family bought 3 adult tickets and 2 child tickets for a movie. An adult ticket costs $4 more than a child ticket. If they spent $58 altogether, then how much does each type of ticket cost?
3(x + 4) + 2x = 58
Child ticket is $7
Adult ticket is $11
What are we learning about next Tuesday in class?
Compound Inequalities