Download 1.8 – Introduction to Equations

1.8 – Introduction to Equations
Vocabulary for 1.8 – Intro to Equations
1. Equation – a mathematical sentence
that uses an equal sign ( = )
2. Open Sentence – an equation with 1
or more variable
3. Solution to Equation – the value of
the variable that makes the equation
true
True, False, or Open Sentence?
 24 + 8 = 2 + 30
 5(2) = 10
 4x – 3 = 9
Solution to an Equation?
Is m = ½ a solution to 6m – 8 = 5?
Is x = 2 a solution to 3x + 1 = ?
Write the verbal phrase as an
equation and solve mentally.
1. The difference of 12 and a number y
is 3.
2. The quotient of a number and 3 is 9.
You can also create a table to help
you solve an equation.
Ex) 5n + 8 = 48
n
5n + 8
48
Create a table to help you solve the
equation.
Ex) -9x – 5 = 28
x
-9x – 5
28
Homework – due Thursday!
Page 56 #9, 12, 15, 18, 21, 24, 25, 26,
31, 34, 37, 39, 41