Question

the sum of three consecutive odd numbers is 63 find them

Answer 1

Let the three consecutive number be (a-d),(a)and (a+d)
now
a-d+a+a-d=63
3a=63
a=21

Answer 2

Let the three numbers Be 2x+1, 2x+3, 2x+5.
Therefore, 2x+1+2x+3+2x+5=63
6x + 9=63
6x=63-9
x=54÷6
x=9
First number=2x+1=2×9+1=19
Second number=2x+3=2×9+3=21
Third number=2x+5=2×9+5=23