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Sagot :
Answer:
The answer is below
Step-by-step explanation:
1) Adding both equations is not suppose to yield that result, the correct result from the addition is:
-3x + y = 8 (1)
+
-3x + y = -4 (2)
-6x + 2y = 4
2) The coefficient of x and the coefficient of y in the first equation is equal to the coefficient of x and the coefficient of y in the second equation. Since they have the same equation, then to perform elimination, both equation is supposed to be subtracted and not added. Hence:
-3x + y = 8 (1)
-
-3x + y = -4 (2)
0 + 0 = 12
0 = 12
The equation has no solution
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