Step-by-step explanation:
Given that the unknown number is x
To find the equation we need to add the unknown number to the known number and equate the results I.e
Hence the equation is
x+ 1/2= 4
We can go further by solving for x
Subtracting 1/2 from both sides of the equation one
x= 4-1/2
x=(8-1) /2
x= 7/2
Also
7/2+1/2= 4
