Solve for x: 3x - 15 = -9.
Answer and explanation
Correct answer: B. 2
- Step 1: Subtract -15 from both sides: 3x = 6.
- Step 2: Divide by 3: x = 2.
Answer
2.
Why not the others: 3: the constant was moved with the wrong sign. 6: the equation was not divided by the coefficient. -2: the sign of the solution was reversed.
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