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Using Methods to Solve Equations 3 MAY 2015 Method 1: Inspection Look carefully at each part of the equation Think about what it does 2a – 1 = 13 Taking 1 away from 2a makes it 13, so 2a is 14 A is half of 14 So a = 7 COMPLETE NUMBER 7 a, b, c, d, e on page 77 Method 2: Guess and Check First guess a solution Check if it works by putting it into the equation If it does not work, change number and check again X+3=7 I guess 3. 3+3=6, not 7, so I guess a bigger number I guess 4. 4+3=7 so x=4 COMPLETE NUMBER 8 a, b, c, d, e, f on page 78 Method 3: Strip Diagrams Draw a strip diagram 3x-5=13 The strip diagram tells us that 3x=18 So x=6 COMPLETE NUMBER 10 a, b, c, d, e on page 80 HOMEWORK: Pages 83-84 Questions 14 and 15 ICT LAB TOMORROW