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How many solutions does the equation $x + 4 = 9$ have?

Class 7Checking Solutions by TrialSimple Equations

AExactly one, $x = 5$
BTwo
CEvery number
DNone

Step-by-Step Solution

Only 5 + 4 gives 9. A simple linear equation like this has exactly one solution.

Answer: A) Exactly one,

x = 5

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