Answer:
I. y = 1/2*x - 2
II . y = -3*x + 5
1/2*x - 2 = -3*x + 5
7/2*x - 2 = 5
7/2*x = 7
x = 7 * 2/7 = 2
y = 1/2*2 - 2 = -1
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