1. Lesson 2­2.notebook October 01, 2012
Lesson 2.2:
*Addition Property of Equality ­ for any real numbers a, b, and c,
if a = b, then a + c = b + c
*Subtraction Property of Equality ­ for any real numbers a, b, and c,
if a = b, then a ­ c = b ­ c
*Multiplication Property of Equality ­ for any real numbers a, b, and
c, if a = b, then ac = bc
*Division Property of Equality ­ for any real numbers a, b, and c,
if a = b, then a/c = b/c
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2. Lesson 2­2.notebook October 01, 2012
*FYI...to solve equations..."ISOLATE THE VARIABLE".
...AND..."what we do to one side of the equation...we must do to
the other" [to keep them equal]
*Also...dividing by a fraction really means....
...multiplying by its "reciprocal"!
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3. Lesson 2­2.notebook October 01, 2012
Lesson 2.2 examples:
Solve each equation. Check your answer.
A) 104 = y ­ 67 Check:
B) 2 n = 10 Check:
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4. Lesson 2­2.notebook October 01, 2012
C) ­61 = d + (­18) Check:
D) ­16 ­ (­t) = ­45 Check:
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5. Lesson 2­2.notebook October 01, 2012
E) 4 1/5 = 3p Check:
F) 2 z Check:
5 45
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