chris age after 9 years will be 5 times his age 5 years back . what is the present age of chris ?
"chris present age = x after 9 years = x + 9 5 years back = x - 5 x + 9 = 5 ( x - 5 ) x = 16 answer is e"
subtract(divide(add(multiply(5, 5), 9), subtract(5, const_1)), subtract(divide(add(multiply(5, 5), 9), subtract(5, const_1)), 5))