Question

y +2=9
by trial and error method​

Answer 1

Answer:

answer is 7

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Answer 2

Answer:

let y be 1

so , y + 2 = 9

1 + 2 = 9

3 ≠ 9

now let y be 5

so, 5 + 2 = 9

7 ≠ 9

now let y be 7

so, 7 + 2 = 9

9=9

So, y = 7