Slide 2:
is the distance between a and 0 on a number line. The distance between x and 0 is 4. 4 units 4 units x = 4 or x = -4
Slide 3:
EX x = 6 or x = -6 EX x -5 = 9 or x – 5 = -9 +5 +5 x = 14 +5 +5 x = -4 Check 9 = 9 9 = 9
Slide 4:
EX +5 +5 3 3 2x – 7 = 3 or 2x – 7 = -3 +7 +7 2x = 10 2 2 x = 5 +7 +7 2x = 4 2 2 x = 2
Slide 5:
EX -6 -6 There is no solution because absolute value cannot be negative.