Playing Cards

Kara has 2 times more cards than Dana, Dana has 4× less than Mary. Together they have 728 cards. How many cards has each of them?

Correct result:

K =  208
D =  104
M =  416


K=2D D=M/4 728=K+D+M  D(1+2+4)=728 D=7287=104  K=2D=2104=208  M=728KD=728208104=416

D= M/4
728 = K+D+M

2D-K = 0
4D-M = 0
D+K+M = 728

D = 104
K = 208
M = 416

Our linear equations calculator calculates it.

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