the ratio of two no. addition and subtraction be 4:3.the what is the ratio of numbers?
Choose the most appropriate option:  A) 3 : 2  B) 4 : 3  C) 5 : 1  D) 6 : 5  E) 7 : 1

Rationale: ( x + y ) / ( x - y ) = 4 / 3 dividing numerator and denominator by y ( x / y ) + 1 / ( x / y ) - 1 = 4 / 3 let x / y be z z + 1 / z - 1 = 4 / 3 3 z + 3 = 4 z - 4 z = 7 x / y = 7 answer e
Answer: E