Answer:
According to the problem,
The sum of 1/4 of the number and 15 is 13.
So,
We can write this as an equation,
1/4x+15=13
We need to subtract 15 from both side of the equation,
1/4x+15-15=13-15
1/4x=-2
We can do this by multiplying both side of the equation by 4;
4×(1/4x)=-2×4
x=-8
