Question

P=a+b+c solve for a pre algebras

Answer 1

a = P - b - c

Explanation:

given

P = a + b + c ( to isolate a we require to subtract b and c from both sides )

subtract b from both sides

P - b = a + b - b + c ( simplify )

P - b = a + c ( subtract c from both sides )

P - b - c = a + c - c , that is

P - b - c = a