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RongEr
:
Dora spends $800 of her salary each month and saves the rest. If she increases her spending by 30%, her savings will decrease by 40%. What is her monthly savings?
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April 24, 2016 at 9:27am
Shu Yun
:
Let x be her salary, y be savings Salary = Expenditure + savings x = 800 + y ---(1) Now., spending increases by 30% (800x1.3), savings decreases by 40% (0.6y) x = (800*1.3) + 0.6y ---(2) Hence 800 + y = 1040 + 0.6y 0.4y = 240 y = 600 Hence monthly savings is $600
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April 28, 2016 at 9:08am
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