It cannot be simplified any further, so it is:
2x + 7y
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2x-7y=14 2x-14=7y from this equation the slope is 2/7
If you mean: 2x+7y = -1 and 4x-3y = -19 then by substitution x = -4 and y = 1
4x + 3y - 2x - 7y2x - 4y
10x+2x-3y-4y=12x-7y
2x(y - 3) + 7(y - 3) = (2x + 7)(y - 3)