Homework Help: Intermediate Algebra

Posted by Donna on Thursday, November 11, 2010 at 6:25pm.

if a system has an infinite number of solutions, use set-builder notation to write the solution set. If a system has no solution, state this.

m - 2n = 16,

4m + n = 1

Intermediate Algebra - Reiny, Thursday, November 11, 2010 at 6:37pm
this one is not hard to solve,

mentally double the second equation and add that result to the first one ...
9m = 18
m = 2
mentally sub that into the second equation...
8+n=1
n = -7

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