Hey there!
Let's take the first number as ' x '
What is consecutive?
The preceding numbers
Hence, the second number = x + 1
The third number = x + 2
The sum of all the three numbers = 51
x + x + 1 + x + 2 = 51
3x + 3 = 51
subtracting by 3 on both sides
3x = 48
dividing by 3 on both sides
3x / 3 = 48 / 3
x = 16
The first number = 16
Second number = x + 1 = 17
Third number = 17 + 1 = 18
The three numbers = 16 , 17 , 18
Hope my answer helps!