S OLVING E QUATIONS ( REVIEW ) 8 th Grade: Pre-Algebra.
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Transcript of S OLVING E QUATIONS ( REVIEW ) 8 th Grade: Pre-Algebra.
![Page 1: S OLVING E QUATIONS ( REVIEW ) 8 th Grade: Pre-Algebra.](https://reader035.fdocuments.us/reader035/viewer/2022071808/56649ef65503460f94c0a028/html5/thumbnails/1.jpg)
SOLVING EQUATIONS (REVIEW)8th Grade: Pre-Algebra
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CHECK HW
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VOCABULARY
Equation Solve Solution Inverse Operation Isolate the Variable Addition Property of Equality Subtraction Property of Equality Division Property of Equality Multiplication Property of Equality
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PROPERTIES OF ADDITION & MULTIPLICATION
Associative Property of Addition:
(a + b) + c = a + (b + c)
Associative Property of Multiplication:
(a x b) x c = a x (b x c)
Commutative Property of Addition:
a + b = b + a
Commutative Property of Multiplication:
a x b = b x a
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MORE PROPERTIES
Distributive Property:
a x (b + c) = (a x b) + (a x c)Identity Property of Addition:
0 + a = aIdentity Property of Multiplication:
1 x a = aInverse Property of Addition:
a + (-a) = 0Inverse Property of Multiplication:
a x 1/a = a/a = 1 when a ≠ 0
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SOLVING ONE-STEP EQUATIONS
A. n + 9 = 27
B. 12 + y = 55
C. 67 = 51 + x
D. h – 12 = 18
E. r – 11 = 28
F. c – 7 = 21
G. 5 + x = 23
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SOLVING MORE ONE-STEP EQUATIONS
A. 2x = 14
B. w/5 = 11
C. 3h = 45
D. x/4 = 36
E. x/3 = 9
F. 6d = 66
G. r/4 = 7
H. 7d = 12
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REMEMBER INTEGER RULES
A. 2z = -6
B.
C. -6k = 54D. -8d = -12E. -p = -34F. -w = 17G. -t = 62H. -y = -16
205
y
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REVIEW SOLVING ONE-STEP EQUATIONS
1. 5y = -25 8. z – 15 = -192. x + 4 = 24 9. -13d = 43. d – 11 = 14 4. -t = 2 10.5.
6. -14b = 127.
86
a
310
c
214
x
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SOLVING TWO-STEP EQUATIONS
A. 6x – 4 = -34
B. 5y – 3 = 32
C. 8 – t = 1
D. 10p – 6 = -36
E. 11 – 9m = -70
F. 4x – 12 = 24
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HOMEWORK PRACTICE
Pre-Algebra Textbook:
Page 16 (21-35)
Page 21 (29-36)