x + 4.5 = 10; what is x?

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Study for the GMAS 6th Grade Mathematics Test. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

x + 4.5 = 10; what is x?

Explanation:
To find x, you undo the addition that includes x. If x plus 4.5 equals 10, subtract 4.5 from both sides to isolate x. So x = 10 − 4.5 = 5.5. Check by plugging back: 5.5 + 4.5 = 10, which matches the given total. Other possibilities don’t satisfy the equation: for example, 4.5 would give 9, 6 would give 10.5, and 10 would give 14.5. Therefore, 5.5 is the solution.

To find x, you undo the addition that includes x. If x plus 4.5 equals 10, subtract 4.5 from both sides to isolate x. So x = 10 − 4.5 = 5.5. Check by plugging back: 5.5 + 4.5 = 10, which matches the given total. Other possibilities don’t satisfy the equation: for example, 4.5 would give 9, 6 would give 10.5, and 10 would give 14.5. Therefore, 5.5 is the solution.

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