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✖️ Value of x

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I can substitute a value for a letter.

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Substitution means putting a number in place of the letter, then calculating.

Example: If x = 3, find 2x + 4

  1. 2 × 3 = 6
  2. 6 + 4 = 10

Questions get harder as you go. The last ones ask you to type the answer.