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5x+18 = 2x+9 5x-2x = 9-18 3x = -9 x = -3 and y = 3
x = -1.2, y = -3
If: x = 7 Then: y = (2*7)+3 = 17 And: 5x+y = (5*7)+17 = 52
5
-5x=3+y x=-1/5y-3/5