Solve multi step equations and inequalities.

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Presentation transcript:

Solve multi step equations and inequalities. Lesson 1.5 Objective: Solve multi step equations and inequalities.

Ex. 2 Ex. 1

5x + 2 = 2x - 10 -2x -2x 3x + 2 = -10 - 2 = - 2 3x = -12 3 3 x = -4 Example 3: 5x + 2 = 2x - 10 -2x -2x 3x + 2 = -10 - 2 = - 2 3x = -12 3 3 x = -4

Example 4: -x -x +19 +19 Dividing by a positive 2, so we don’t need to switch the sign  2 2

2(3x - 1) + 7 = -1 6x + -2 + 7 = -1 6x + 5 = -1 -5 = -5 6x = -6 6 6 Example 5: 2(3x - 1) + 7 = -1 6x + -2 + 7 = -1 6x + 5 = -1 -5 = -5 6x = -6 6 6 x = -1

Example 6: -3x -3x +7 +7 2 2

What does this true statement mean? Example 7: 4x - 8 = -8 + 4x +4x +4x - 8 = -8 What does this true statement mean? Solution: ALL real numbers

Example 8: -15 -15 3 3

Example 9: YOUR TURN

Example 10: Your turn

Are you a master???

Homework: 1.5 in HW packet