3=p+x

Solution for 3=p+x equation:

Simplifying
3 = p + x

Solving
3 = p + x

Solving for variable 'p'.

Move all terms containing p to the left, all other terms to the right.

Add '-1p' to each side of the equation.
3 + -1p = p + -1p + x

Combine like terms: p + -1p = 0
3 + -1p = 0 + x
3 + -1p = x

Add '-3' to each side of the equation.
3 + -3 + -1p = -3 + x

Combine like terms: 3 + -3 = 0
0 + -1p = -3 + x
-1p = -3 + x

Divide each side by '-1'.
p = 3 + -1x

Simplifying
p = 3 + -1x