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Answer the question in the included image?
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Answer the question in the included image?

Answer the question in the included image?-example-1
User Gileneusz
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1 Answer

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2x+15 +2x+3x+20+9=100

7x+44=100

7x=100-44=56

=> x=56:7

x=8

=> 4x+15=32+15=47 stamps in the 20th century

Probability=47/100; 47%

User Bo Borgerson
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