if ( c - a ) / ( c - b ) = 3 , then ( 5 b - 5 a ) / ( c - a ) =
"let ' s say c = 7 , b = 5 , a = 1 so that our 1 st expression holds true . now , ibsert those numbers in the second expression and we ' ll get 3.33 answer d ( hopefully ) ) )"
multiply(subtract(5, const_2.0), 5)