Question

A man spends 30% of his income on food 10% on transport and 25% on rent £f he is left with rs 10500 what is his.Salary

Answer 1

$let \: x \: be \: the \: i ncome \\ 30x \div 100 + 10 x \div 100 + 25x \div 100 + 10500 = x \\ 30x + 10x + 25x + 1050000= 100x \\ 10500 = 35x \\ x = 30000$