The given expression can be simplified to: 2x-2
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It is 5x - 9.
If: x+9+5x = 21+2x Then: x = 3
39 = 5x + 9 5x = 39 - 9 5x = 30 x = 30 / 5 x = 6
5x+18 = 2x+9 5x-2x = 9-18 3x = -9 x = -3 and y = 3
9 + 5x = -4x + 63 9 + 9x = 63 9x = 54 9x/9 = 54/9 x = 6