Transcript PPT - FLYPARSONS.org

Lesson 1.7: Equations with
Integers
Standards: NS 1.2, AF 2.1, AF 4.2
Objective: Solve one-step equations
Objective - To solve simple equations
involving integers.
Addition/Subtraction
x+8=2
-8 -8
x = -6
y - 13 = -4
+13 +13
y=9
Multiplication/Division
-3x = 21
-3 -3
x = -7
m
(-2)
= 8 (-2)
-2
m = -16
Quick Draw for Points!
• You will have 30-60 seconds to solve each
problem.
• The text is Equations with Integers
Solve.
1) 8  y  3
8
8
y  5
k
2)
 12
3
k
 3 3  12  3
k  36
3) 9  m  3
3
3
6  m
4)
8b  72
8b  72
8
8
b  9
Translate each sentence and solve.
1) The difference of x and 3 is the same as -19.
x  3  19
3  3
x  16
2) The quotient of y and -5 equals 10.
y
 10
5
y
 5 5  10  5
y  50
Profit
• Profit is how much extra you make.
• So, Profit equals how much you made
minus how much it cost you to pay for
bills.
• Profit = Income - Expenses
Profit
Profit = Income - Expenses
Palo sells 40 lasers for $5 each. If a case of 40
lasers costs him $75, how much profit was made?
Profit = Income - Expenses
Profit = 40($5) - $75
Profit = $200 - $75
Profit = $125
Profit
ABC Company has annual expenses of $3200. If
they are to make a profit of $4800 this year, what
income will they need?
Profit = Income - Expenses
$4800 =
+ $3200
x - $3200
+ $3200
$8000 = x
Income = $8000