the product of a and b is equal to 11 more than twice the sum of a and b . if b = 5 , what is the value of b - a ?
"ab = 11 + 2 ( a + b ) 5 a = 11 + 2 a + 10 3 a = 21 a = 7 b - a = 5 - 7 = - 2 a is the answer"
subtract(5, divide(add(multiply(5, const_2), 11), subtract(5, const_2)))