Question

one half of a number is equal to one third of its succeeding number find the first number

Answer 1

let the number be x and x+1
given that
x/2=(x+1)/3
3x=2x+2
3x-2x=2
x=2

x=2

Answer 2

Hey friend! Here is the solution of your question.
Let the number be x.
Its succeeding number=x+1
1/2x=1/3(x+1)
1/2x=1/3x+1/3
1/2x-1/3x=1/3
3x-2x/6=1/3
x/6=1/3
x=1/3×6
x=2