SOLUTION: slove .... a+5b-c=-20 4a-5b+4c=19 -a-5b-5c=2 slove the following system of equations algebraically for all values of a,b,c: algebraically solve the following systems of equa

Question 1170352: slove ....
a+5b-c=-20
4a-5b+4c=19
-a-5b-5c=2
slove the following system of equations algebraically for all values of a,b,c:
algebraically solve the following systems of equations. verify your reasoning. explain your reasoning.
Describe the two solutions of the systems both rational, both irrational or one rational and one irrational
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
the first and third add to -6c=-18 or c=3
-
4a-5b=7 and
a+5b+15=-2; change signs to a+5b+5c=-2
so 5a=-10 and a=-2. That makes -5b=15 so b=-3
(-2, -3, 3)
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