Lesson 2 3 Solving Equations by Multiplication and
Lesson 2 -3: Solving Equations by Multiplication and Division Algebra 1 CP Mrs. Mongold
Multiplication Property of Equality �If you multiply each side of the equal sign by the same number, the equation is true
Multiplication Property of Equality �
Division Property of Equality �If you divide each side of the equal sign by the same number, the equation is true
Division Property of Equality �If you divide each side of the equal sign by the same number, the equation is true ◦ Think about “undoing” multiplication by doing the opposite which is division 13 s = 195 -3 x = 36
Things to remember �Always get the variable by itself by “undoing” the operation in the equation �Dividing by a fraction is the same as multiplying by its reciprocal �Double check your answer after you find a solution to make sure you didn’t make a simple mathematical mistake!!
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Examples page 20 � 13. One-fifth of a number equals 25. Find the number.
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Examples page 20 � 14. What number divided by 2 equals -18?
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Examples page 20 � 15. A number divided by eight equals 3. Find the number.
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Examples page 20 � 16. One and a half times a number equals 6. Find the number.
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Homework �Page 22/ 1 -18 ALL
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