for 2 consecutive yrs , my incomes are in the ratio of 4 : 7 and expenses in the ratio of 3 : 5 . if my income in the 2 nd yr is rs . 42000 & my expenses in the first yr in rs . 20000 , my total savings for the two - year is
"sol . income in first year = * x 42000 = rs . 24000 expenses in second year = \ x 21000 = rs . 35000 total savings = total income - total expenses = ( 42000 + 24000 ) - ( 20000 + 35000 ) = 66000 - 55000 = rs . 11000 e"
add(subtract(42000, divide(multiply(20000, 5), 3)), subtract(divide(multiply(42000, 4), 7), 20000))