SOLUTION: A+B=140 B+C=160 C+D=130 D+A=110

SOLUTION: A+B=140 B+C=160 C+D=130 D+A=110

Algebra.Com

Question 822522: A+B=140
B+C=160
C+D=130
D+A=110

Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
Writing in matrix form we get the augmented matrix:

After row operations the system can be transformed to:

using t we can write:

A=110-t
B=t+30
C=130-t
D=t
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