5+2P=10-2P
im assuming here that 5+2P is 10, so we can use that for our find what equals P situation
(besides, its easier for me 5+2P than 10-2P)
5+2×P=10
We can subtract 5-5 and 10-5, equaling:
2×P=5
We divide 2 on both 2P and 5, and P=2.5
overall answer: P=2.5