if ( c - a ) / ( c - b ) = 1 , then ( 5 b - 2 a ) / ( c - a ) =
let ' s say c = 3 , b = 2 , a = 2 so that our 1 st expression holds true . now , ibsert those numbers in the second expression and we ' ll get 6 answer e ( hopefully ) ) )
multiply(subtract(5, 2), 2)