Question

Which equation has the solution x, equals, 3x=3?
Answer
Multiple Choice Answers
2, x, minus, 7, equals, minus, 12x−7=−1
8, x, minus, 8, equals, 688x−8=68
8, x, minus, 4, equals, 848x−4=84
6, x, minus, 6, equals, minus, 126x−6=−12

Answer 1

To determine which equation has the solution \( x = 3 \), we need to substitute \( x = 3 \) into each equation and see if the equation holds true.

1. **Equation: \( 2x - 7 = -1 \)**
\[
2(3) - 7 = -1 \\
6 - 7 = -1 \\
-1 = -1 \quad (\text{True})
\]

2. **Equation: \( 8x - 8 = 68 \)**
\[
8(3) - 8 = 68 \\
24 - 8 = 68 \\
16 = 68 \quad (\text{False})
\]

3. **Equation: \( 8x - 4 = 84 \)**
\[
8(3) - 4 = 84 \\
24 - 4 = 84 \\
20 = 84 \quad (\text{False})
\]

4. **Equation: \( 6x - 6 = -12 \)**
\[
6(3) - 6 = -12 \\
18 - 6 = -12 \\
12 = -12 \quad (\text{False})
\]

From this, we see that the only equation that holds true when \( x = 3 \) is:
**\( 2x - 7 = -1 \)**.

Thus, the answer is:
**\( 2x - 7 = -1 \)**.