Question 1197588
Clarence withdrew 25% of his saving from the bank on Monday.He spent $720 on a television set,$163 on a radio and the remaining $37 on a clock.He received his salary the fallowing day and deposited 2/5 of it into the bank.As a reasult,the total amount in his bank increased to $4680.Find Clarence's salary?
<pre>Amount withdrawn and spent: 720 + 163 + 37 = $920
With $920 being 25% of his savings, and R being the REMAINDER (75% or .75) in the bank after the 
withdrawal, we get the following PROPORTION: {{{matrix(2,3, .25/.75, "=", 920/R, .01/.03, "=", 920/R)}}}
                                             .01R = .03(920) ------ Cross-multiplying
REMAINDER in the bank after the withdrawal, or {{{matrix(1,7, R, "=", .03(920)/.01, "=", 3(920), "=", "$2,760")}}}

Now, since after {{{2/5}}} of his salary was deposited, he had $4,680, then {{{2/5}}} of his salary is: $4,680 - 2,760 = $1,920
With $1,920 being {{{matrix(1,3, 2/5, or, .4)}}} of his salary, and S being his salary, we get the following
PROPORTION: {{{matrix(1,3, .4/1, "=", "$1,920"/S)}}}
            .4S = 1,920 ------ Cross-multiplying
  Salary, or {{{matrix(1,7, S, "=", "1,920"/.4, "=", "19,200"/4, "=", highlight("$4,800"))}}}

FYI: That dude's answer is WRONG, as usual!!</pre>