Download 3-3 Combining like terms to solve equations

WARM UP
The geese in Algonquin Park left to migrate south. On the first day,
five geese left. On the second day, ten geese left. On the third
day, 20 geese left. If this pattern continued, how many geese
left the park in a ten-day period?
DEFINITIONS
If a term has a variable, the numerical factor is called the
coefficient. Terms are like terms if they have exactly the same
variable factors.
SIMPLIFY THE EXPRESSION
- 2 + 6x + z – 2x + 8 – 4z
SIMPLIFY THE EXPRESSION
9a + 10 – a + 3x - 5
SIMPLIFY THE EXPRESSION
-4 + y – 9m – m + 2y
MONEY
Each used book at the library sale sold for the same amount.
Suppose you bought 6 mysteries and 8 science-fiction books.
Then you bought a poster for $2.40. You spent a total of $8.70.
Find the cost of each book.
ENTERTAINMENT
As a gift for your brother, you order two concert tickets. Two days
before the concert a friend asks to join you. When you order the
third ticket, there’s a $12 charge for express delivery. The total
bill is $78. How much does each person owe?
GEOMETRY
A rectangle has perimeter 42 cm. The length is 3 cm greater than
the width. Find the width and length of the rectangle.
USE EQUATIONS TO FIND THE VALUE OF EACH VARIABLE.
Sum angles of
a triangle = 180.
Sum angles of
quadrilateral =
360.
CLASSWORK
HOMEWORK