Answer:
x = p(m-n)
Explanation:
making 'x' the subject means to change the equation to 'x=' instead of 'm='
since 'x' is being divided by 'p' we can multiply each side of the equation by 'p' to get:
pm = pn + x
now we can subtract 'pn' from each side to get:
pm - pn = x
we can simplify this to become: x = p(m-n)