Solve the perimeter formula for an isosceles triangle, p=2a+b for b

Solution for P=2a+b equation:

 Simplifying P = 2a + b
 Solving P = 2a + b Solving for variable 'P'.
  Move all terms containing P to the left, all other terms to the right.
  Simplifying P = 2a + b

Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.