Parametric to Cartesian equation:

Parametric is: x=-10-2s and y=8+s

Please be thorough, thanks for your help :)

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x = -10 - 2s
y = 8 + s

2s = -x - 10
s = (-1/2) * (x + 10)
y = 8 + s
y = 8 - (1/2) * (x + 10)
y = (16 - x - 10) / 2
y = (6 - x) / 2