Posted by chris on Thursday, March 22, 2012 at 10:36pm.
alex is x years old his sister is 3 years older , togerther their age is 57. what is the equation for this.

math  David, Thursday, March 22, 2012 at 10:59pm
x+x+3=57

math  mugisha, Friday, March 23, 2012 at 11:45am
27x
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