Question

Use substitution to determine which number from the set \{6, 7, 8, 9\} makes the equation 63 + x = 9 true.
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Answered by GPT 3.5
To find which number from the set makes the equation true, we can substitute each number into the equation and solve for $x$.

For $x=6$, the equation becomes $63 + 6 = 9$, which is not true.

For $x=7$, the equation becomes $63 + 7 = 9$, which is not true.

For $x=8$, the equation becomes $63 + 8 = 9$, which is not true.

For $x=9$, the equation becomes $63 + 9 = 9$, which is true.

Therefore, the number from the set $\{6, 7, 8, 9\}$ that makes the equation $63 + x = 9$ true is $\boxed{9}$.