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Anonymous
No it doesn't. If you look at the problem:
-91 = 9 + -18 and solve
-91 = -9
Those two are not the same thing, therefore the answer is "No solution" or "No real answer".
Wiki User
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Yes it is 9+9=18
27
9 + 8 + 16 + 17 + 18 = 68
5x+18 = 2x+9 5x-2x = 9-18 3x = -9 x = -3 and y = 3
y= -9