Question

find the solution of following equation of trial and error method question
$25 - x = 18$
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Answer 1

Answer:

7 is the correct answer

Answer 2

Answer:

Since the no. is definitely greater than 5 ( because the tens place has been decreased)

We check from 6

6

25-x=18

25-6=19

6 is not possible

7

25-x=18

25-7=18

7 is the answer