Solving Subtraction Equations

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Presentation transcript:

Solving Subtraction Equations Lesson 16 Introductory Algebra Solving Subtraction Equations

Warm-Up Solve each equation. Show all work and check your solution. f + 57 = 160 18.9 = x + 10.2 The sum of p and eight is thirty. Write and solve an equation to find the value of p.

Solving Subtraction Equations Target: Solve equations involving subtraction.

The Addition Property of Equality For any numbers a, b and c: If a = b, then a + c = b + c

Example 1 Solve each equation. Check your solution. y – 3 = 14 +3 +3 y = 17 (17) – 3 = 14 52 = x – 7 +7 +7 59 = x 52 = (59) – 7 m – 6 = 2 +6 +6 m = 8 (8 ) – 6 = 2 Solve each equation. Check your solution.

Exit Problems Solve each equation. Show all work and check your solution. g – 11 = 30 7.2 = x – 3.8 h – 317 = 482 y minus twenty-three is six. Write and solve an equation to find the value of y.

Communication Prompt What is the benefit of solving equations using the Properties of Equality rather than the Guess, Check and Revise method?