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# robert bought 8 dollars worth of 6 cent stamps and 8 cent stamps. He has a total of 110 stamps. Find how many of each stamp he has.

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robert bought 8 dollars worth of 6 cent stamps and 8 cent stamps. He has a total of 110 stamps. Find how many of each stamp he has.

Guest Apr 29, 2015

#4
+11752
+5

absulutely...you know my brain takes a bit time to take such things in and verify them..........its kinda tubeligh !LOL......

anyways thank you!

actually today or tonight im happy....ive got my lost favorite comb!so a gift for you!

rosala  Apr 29, 2015
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#1
+78551
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Let x be the number of 6 cent stamps. Then 110 - x equals the number of 8 cent stamps. So we have... (in cents).....

6x +  8(110 - x)  = 800     simplify

6x + 880 - 8x  = 800

-2x + 880  = 800     subtract 880 from both sides

-2x = - 80                 divide both sides by -2

x = 40     and that's the nimber of 6 cent stamps

And (110 - 40)  =70    and that's the number of 8 cent stamps

CPhill  Apr 29, 2015
#2
+11752
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Cphill thats an excellent answer (obviously...as always)...but as usual the problem is i dont get this step...i mena cna you tell me why you did it like this....explain....

6x +  8(110 - x)  = 800     simplify

rosala  Apr 29, 2015
#3
+78551
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Rosala.....

Notice that the cost of each stamp type times the number of them can be written as :

6 cents x the number of 6 cent stamps  + 8 cents x the number of 8 cent stamps =  the total cost (8.00 or 800 cents)

Or simply

6x + 8(110 - x)  = 800    [I'm expressing everything in terms of cents in this equation ]

Does that make sense  ????

CPhill  Apr 29, 2015
#4
+11752
+5

absulutely...you know my brain takes a bit time to take such things in and verify them..........its kinda tubeligh !LOL......

anyways thank you!

actually today or tonight im happy....ive got my lost favorite comb!so a gift for you!

rosala  Apr 29, 2015
#5
+78551
0

Thanks, rosala....those dates look good  !!!!

CPhill  Apr 29, 2015

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