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January 31, 2015

January 31, 2015

Posted by **janie** on Thursday, July 12, 2012 at 10:31pm.

a=c-d+9

a=b-d+11

Based on the system of equations above, what is the value of a?

a) 2

b) 9

c) 10

d) 11

e) 20

- math -
**Steve**, Friday, July 13, 2012 at 12:11amcan't tell. There are 4 unknowns, but only three equations. Any system where

c = b+2

b+d = 11

will work. For example, the table below shows various values of a

b c d a

1 3 10 2

2 4 9 4

. . .

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