basic algebra

X+3/2=15 = X+1.5
X=15-1.5=13.5
X=13.5



OR


(X+3)/2=15
=(x/2)+1.5=
X=2*(15-1.5)=2*13.5=27
X=27

nsambarr:

x+3/2=15

You just need to get rid of 3/2 from the LHSide.

You do this by taking it away.

x+3/2-3/2 = 15 - 3/2

Now 3/2 ia 1 and a half (or 1.5) Just as our guest told you. so

x = 15 - one and a half
x = 14 - a half
x = 13 and 1/2 (or 13.5)