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 By: bigboy168123 (offline)  Friday, February 17 2012 @ 08:50 PM CST (Read 1020 times)
bigboy168123

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Registered: 09/09/11
Posts: 3

 By: awyw1201 (offline)  Friday, February 17 2012 @ 10:58 PM CST
awyw1201

1st box on the left

Multiply top left with bottom right----5 x 2a =10a
Multiply top right with bottom left---4 x 5a = 20a

Middle box

Multiply top left with bottom right----10b x 2 = 20b
Multiply top right with bottom left---b x 40 = 40b

Thus, 6 x 5c = 30c
2 x ? = 60c
? = 60c/2 = 30c

Ans: 30c

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Registered: 07/08/11
Posts: 87

 By: bigboy168123 (offline)  Friday, February 17 2012 @ 11:02 PM CST
bigboy168123

Quote by: awyw1201

1st box on the left

Multiply top left with bottom right----5 x 2a =10a
Multiply top right with bottom left---4 x 5a = 20a

Middle box

Multiply top left with bottom right----10b x 2 = 20b
Multiply top right with bottom left---b x 40 = 40b

Thus, 6 x 5c = 30c
2 x ? = 60c
? = 60c/2 = 30c

Ans: 30c

Thanks for the help.

Newbie

Registered: 09/09/11
Posts: 3

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