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Question 92039: Solve by addition method. Indicate whether independent, inconsistent or dependent.
x + 3(y - 1) = 11
2 (x - y) +8y = 28
Answer by mathispowerful(115)   (Show Source):
You can put this solution on YOUR website! Solve by addition method. Indicate whether independent, inconsistent or dependent.
x + 3(y - 1) = 11
2 (x - y) +8y = 28
simplify first
x + 3y -3 = 11
2x -2y +8y = 28
x + 3y = 14
2x + 6y = 28
actually these two equation are the same, one can be derived from the other,
so the system is dependent, there will be countless answers which can be represented by
(a, (14-a)/3)
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