Question

the sum of numbers x and 4 is 9

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Answer 1

Answer:

x + 4 = 9

⇒ x = 9 - 4

⇒ x = 5

So, the sum of 5 and 4 is 9, which is true.

Answer 2

x+4=9

x=9-4 (taking 4 on left side)

x =5