Alex and Freddy collect stamps. The number of stamps in Alex’s collection is in ratio 3:5 to the number of stamps in Freddy’s co llection. If Freddy gives Alex 10 stamps, the ratio will change to 7:9. How many stamps are in both collections together?
2 answers:
Suppose Alex has 3x stamps, Freddy has 5x stamps. After Freddy gives Alex 10 stamps, Alex has 3x+10 while Freddy has 5x-10 the new ratio is 7 to 9, so we have the equation: (3x+10)/(5x-10)=7/9 9(3x+10)=7(5x-10) 27x+90=35x-70 160=8x x=20 So Alex has 3*20=60 stamps while Freddy has 5*20=100. Together they have 160
Answer:
160 stamps
Step-by-step explanation:
Suppose Alex has 3x stamps, Freddy has 5x stamps. After Freddy gives Alex 10 stamps, Alex has 3x+10 while Freddy has 5x-10
The new ratio is 7 to 9, so we have the equation: (3x+10)/(5x-10)=7/9
9(3x+10)=7(5x-10)
27x+90=35x-70
160=8x
x=20
So Alex has 3*20=60 stamps while Freddy has 5*20=100. Together they have
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Answer:
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Step-by-step explanation:
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2(16)+17=
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Answer:
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Step-by-step explanation:
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Answer:
the answer is 3
Step-by-step explanation:
because 3x3= 9
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Answer:
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Step-by-step explanation: