Tao wants to check that the expression 3(4x – 6) simplifies to 12x – 18. What is the value when 2 is substituted for x into both expressions?

Substitute x = 2 into the first expression: 3(4 × 2 − 6) = 3(8 − 6) = 6. In the second expression, 12 × 2 − 18 = 24 − 18 = 6. Both expressions have a value of 6, so the correct choice is “The value of each expression is 6.”

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