can someone help me please?

start by adding 1/8 because remember anytime a number move to the other side of the equal sign it changes its sign

so -24-1/8p=3/8p

         +1/8p=1/8p

-24=4/8p divide on both side 4/8

so the answer is p=-48

and to check the answer you multiply -48*4/8 which will equal -24.

so check 4/8(-48)=-24

you can check it on the scientific calculator

Thanks anon,  

Here is another way

$$\\-24-\frac{p}{8}=\frac{3p}{8}\\\\ -24-\frac{1p}{8}+\frac{1p}{8}=\frac{3p}{8}+\frac{1p}{8}\\\\ -24=\frac{4p}{8}\\\\ -24=\frac{p}{2}\\\\ -48=p\\\\ p=-48$$