rebecca ' s annual income is $ 20 , and jimmy ' s annual income is $ 10 , . by how much must rebecca ' s annual income increase so that it constitutes 55 % of rebecca and jimmy ' s combined income ?
total rebecca = x + 20 ; total = x + 20 + 10 x + 20 / x + 30 = 55 / 100 therefore x = 7.77 c
negate(divide(subtract(multiply(add(20, 10), divide(55, const_100)), 20), subtract(const_1, divide(55, const_100))))