for a line to be parallel to another, the slopes of the lines need to match; so, the slope for your second line will be 2 as well.
plug that slope and the given point into point-slope form:
y - y1 = m(x - x1)
y + 5 = 2(x - 6)
then you solve it for y to get it into slope-intercept form
y + 5 = 2x - 12
y = 2x - 17
