Solve for x: 4x + 9 = 25.

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Multiple Choice

Solve for x: 4x + 9 = 25.

Explanation:
Solving a linear equation means isolating the variable by undoing operations on both sides. Start with 4x + 9 = 25. Subtract 9 from both sides to undo the addition: 4x = 16. Then divide both sides by 4 to undo the multiplication: x = 4. Checking the solution, 4(4) + 9 = 16 + 9 = 25, which matches the right side. If you evaluate 16/4, you also get 4, so that form represents the same solution, just not as directly stated. Choosing the straightforward number 4 makes the check immediate.

Solving a linear equation means isolating the variable by undoing operations on both sides. Start with 4x + 9 = 25. Subtract 9 from both sides to undo the addition: 4x = 16. Then divide both sides by 4 to undo the multiplication: x = 4. Checking the solution, 4(4) + 9 = 16 + 9 = 25, which matches the right side.

If you evaluate 16/4, you also get 4, so that form represents the same solution, just not as directly stated. Choosing the straightforward number 4 makes the check immediate.

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