The product of a and b is equal to 1 more than twice the sum of a and b. If b = 7, what is the value of b - a? Select the correct option
A) 2
B) 5
C) 4
D) 24
E) 35

Rationale: "ab = 1 + 2 ( a + b ) 7 a = 1 + 2 a + 14 5 a = 15 a = 3 b - a = 7 - 3 = 4 c is the answer"
Answer: C