X comes first :)
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Cartesian coordinates.
x comes first. (x,y)
the X axis goes first then the Y axis.
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x = 1, y = 9. Here's one way to solve:Since y = x + 8, from the second equation, substitute (x + 8) for y in the first equation: x + (x+8) = 10 --> 2x + 8 = 10, and 2x = 2, so x = 1.Now y = x + 8, so substitute x=1 and get y = 1 + 8 = 9. Check your answer in the first equation: [x+y=10]: 1+9=10, which checks out.