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Anonymous
3x + 7 = 6x - 2
Rearranging gives
6x - 3x = 7 + 2
3x = 9
x = 3
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9x + 3 - 6x - 2 = 3x + 1
x^2 + 3x + 7 = 6x + 18 x^2 - 3x - 11 = 0
2y = 6x+2
9x-19=6x+2 so 3x=21 and x=7
The lines are parallel.