What is P - 15 = 13 -

6p

P-15=13-6p

p=28-6p

7p=28

p=4

It's a simple linear equation in 'P'.

There is only one number that 'P' can be that would make the equation

a true statement. The number is called the"solution" of the equation.

Here's one way to find it:

You said that P - 15 = 13 - 6P

Add 6P to each side: 7P - 15 = 13

Add 15 to each side: 7P = 28

Divide each side by 7 : P = 4