0=p(1+rt)-a

Solution for 0=p(1+rt)-a equation:

Simplifying
0 = p(1 + rt) + -1a
0 = (1 * p + rt * p) + -1a
0 = (1p + prt) + -1a

Reorder the terms:
0 = -1a + 1p + prt

Solving
0 = -1a + 1p + prt

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
0 + a = -1a + 1p + a + prt
Remove the zero:
a = -1a + 1p + a + prt

Reorder the terms:
a = -1a + a + 1p + prt

Combine like terms: -1a + a = 0
a = 0 + 1p + prt
a = 1p + prt

Simplifying
a = 1p + prt