Solving System of Equations in Three Variables?

How would you solve
2a + c = -10
b - c = 15
a - 2b + c = -5 ??

2007-10-14 15:17:10 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

1 answers

2a + c = -10
b - c = 15
a - 2b + c = -5
-
b = c + 15
-
a - 2(c + 15) + c = -5
a - c = 25
-
c = -2a -10
c = a - 25
-
-2a -10 = a - 25
a = 5
-
c = -20
b = -5
-

2007-10-14 17:05:31 · answer #1 · answered by oregfiu 7 · 0⤊ 0⤋

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