Multiply first equation by 3.
6x - 3y = 12
6x - 3y = 7
Does this make the answer clear?
2x - y = 4
6x - 3y = 7
(a) y = 2x - 4
(b)No solution
(c)x = 2, y = -4
(d)x = 2, y = 5/3
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