Question 1196291
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x = his monthly salary
1/5 of which is spent on rent
1/8 of it is spent on the credit card bill


1/5 + 1/8 = 8/40 + 5/40 = 13/40


He spent 13/40 of his monthly salary on rent and the credit card bill
That leaves 27/40 of the monthly salary left over
Think of a pizza with 40 slices. 13 of them are eaten, so 40-13 = 27 are left.


(27/40)*x = 1431
27x = 1431*40
27x = 57240
x = 57240/27
x = 2120


Answer: $2120
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