meaka1
meaka1
13-05-2017
Mathematics
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I need to know this answer so I can get the answer
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yousefhamed
yousefhamed
13-05-2017
CD=50 DVD=40
5C+7D=530
C=D+10
C-D=10
Solve the system
5C+7D=530
5C-5D=50 (multiply by 5)
Subtract
12D=480
D=40
Substitute in any of the equations
C-D=10
C-40=10
C=50
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will1i1ace1it32
will1i1ace1it32
13-05-2017
58 cds and and 34 dvds
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