Question

Se AB = 40 CM, determine PQ nos casos:

Answer 1

a) 3x - 2 + 2x - 4 + x + 4 = 40
    6x =40 + 2 + 4 - 4
    6x = 42
      x = 7

PQ = 2x - 4
PQ = 2.7 - 4
PQ = 14 - 4
PQ = 10 cm
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b) 2x - 5 + 40 = 5x + 17
2x - 5x = 17 + 5 - 40
-3x = - 18
x = 18 : 3
x = 6

5x + 17 = 5.6 + 17 = 47

47 - (x+7) = 47 - (6+7) = 47 - 13 = 34 cm

PQ = 34 cm