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Mathematics 8 Online
OpenStudy (anonymous):

A music store sold 1,112 music CDs one month. This was 20% less than the number of music CDs the store sold the previous month. The following equation represents this situation, where x represents the number of music CDs sold the previous month. x − 0.2x = 1,112 How many music CDs did the store sell in both months combined?

OpenStudy (anonymous):

\[x(1-0.2)=1112\]

OpenStudy (anonymous):

1112 cds?

OpenStudy (anonymous):

No, just factored the x out, divied 1112 by (1-0.2)

OpenStudy (anonymous):

\[x= \frac{ 1112 }{ 0.8}; x=1390\]

OpenStudy (anonymous):

So combined they sold 1112+1390 cd's

OpenStudy (anonymous):

Do you get my reasoning?

OpenStudy (anonymous):

yes, thank you

OpenStudy (anonymous):

np

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