The difference between twice a number, x, and a smaller number, y, is 3. The sum of twice the number and the smaller number is - 3. Which equations represent this situation?
a - y=2x-3 and y=-2x-3
b - y=2x-3 and y=-1/2x-3/2
c - 2x+3 and y=-2x-3
d - y=2x+3 and y-1/2x-3/2
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