What is the equation of line whose slope is -$\frac{1}{2}$ and passes through the intersection of the lines x - y = -1 and 3x - 2y = 0?

What is the equation of line whose slope is -$\frac{1}{2}$ and passes through the intersection of the lines x - y = -1 and 3x - 2y = 0?
1). x + 2y = 8
2). 3x + y = 7
3). x + 2y = -8
4). 3x + y = -7

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