Solving Equations by Adding Subtracting Multiplying and Dividing
Solving Equations by Adding, Subtracting, Multiplying, and Dividing Section 3. 1& Section 3. 2 Solve equations by using addition, subtraction, multiplication and division
Recall Mathematics Language Digits Alphabet Numbers Words Expressions (2 types) Phrases Equations and Inequalities Sentences Numeric Expressions: Numbers combined with operations example: 23 + 15 ÷ |7 - 9²| Algebraic Expressions: Variables combined with numbers and operations example: 2 x – 3 y³ ÷ (-16) Equations: expression = expression
Expressions Evaluate expressions using the order of operations Example: Evaluate each expression. Let x = 7 and y = -2 Numeric Expression (5 + 2³) – (-3)(2 + 4) Algebraic Expression (5 x – 6 y) – (x + 6)
Equations Solve using the order of operations in reverse and inverse operations Example: Solve 2 x – 7 = 13
Equations Solve using the order of operations in reverse and inverse operations Example: Solve a. s + 5. 3 = -9. 7 b. -20 = -38 + b c. Practice: P 115 Try this after Example 1
Equations Solve using the order of operations in reverse and inverse operations Example: Solve a. t – 9. 3 = 4. 1 b. c. -53 = n -25 Practice: P 116 Try this after Example 3
Equations Solve using the order of operations in reverse and inverse operations Example: Solve a. 3 – x = 34 Practice: 5 – x = 17 Homework: 118 -119 #5 -17 o
Equations Solve using the order of operations in reverse and inverse operations Example: Solve a. -5 t = -15 b. 4 y = 9 c. 8 p = -4. 8 Practice: P 123 Try this after Example 1
Equations Solve using the order of operations in reverse and inverse operations Example: Solve a. b. c. Practice: P 124 Try this after Example 3
Equations Solve using the order of operations in reverse and inverse operations Example: Solve a. b. Practice: P 125 Try this after Example 4 c. Homework: P 126 #7 -17 o
Equations Solve using the order of operations in reverse and inverse operations Example: Solve a. 21 + 6 x = -3 b. 2 x – 7 = 13 Practice: P 130 Try this after Example 2
Equations Solve using the order of operations in reverse and inverse operations Example: Solve a. b. Practice: P 131 Try this after Example 3 Homework: P 132 #6 -11
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