Question 362965
the sum of two numbers is 30. five times the smaller exceeds twice the larger by 17. find the numbers. 
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let one number be x
other will be 30-x
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5x=2(30-x)+17
5x=60-2x+17
5x+2x=60+17
7x=77
/7
x= 11 
other number = 19 

and A collection of nickels and quarters totals 3.40. the totale number of coins is 24. how many of each are there?

total coins = 24
let x be nickels
24-x will be quarters
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value 340 cents
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5x+25(24-x)=340
5x+600-25x=340
-20x=340-600
-20x=-260
x=13 nickels
quarters = 11
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11*25+5*13=340
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m.ananth@hotmail.ca