Solve for x: 2x + 6 = 18.

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Multiple Choice

Solve for x: 2x + 6 = 18.

Explanation:
Solving a simple linear equation means isolating the unknown by undoing the operations around it. In 2x + 6 = 18, first remove the added 6 on the left by subtracting 6 from both sides, giving 2x = 12. Then undo the multiplication by dividing both sides by 2, yielding x = 6. Check by substituting back: 2(6) + 6 = 12 + 6 = 18, which matches. Other values won’t satisfy the equation—for example, x = 3 gives 12, and x = 9 gives 24.

Solving a simple linear equation means isolating the unknown by undoing the operations around it. In 2x + 6 = 18, first remove the added 6 on the left by subtracting 6 from both sides, giving 2x = 12. Then undo the multiplication by dividing both sides by 2, yielding x = 6. Check by substituting back: 2(6) + 6 = 12 + 6 = 18, which matches. Other values won’t satisfy the equation—for example, x = 3 gives 12, and x = 9 gives 24.

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