Respuesta :

mirnaxlunam

Answer:

a) 4

b) 13

Step-by-step explanation:

a) Find the value of 1 + 3x when x = 1

substitute 1 for x and then solve

  1. 1+3(1)
  2. 1+3=4

b) Find the value of 7 – 2x when x = -3

substitute -3 for x and then solve

  1. 7-2(-3)
  2. 7+6=13

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