5X = 2X + 9
subtract 2X from each side
5X - 2X = 2X - 2X + 9
3X = 9
divide each sides integer by 3
(3/3)X = 9/3
X = 3
------------check in original equation
5(3) = 2(3) + 9
15 = 6 + 9
15 = 15
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5x+18 = 2x+9 5x-2x = 9-18 3x = -9 x = -3 and y = 3
5x + x - 6x + 2x = 2x
If: x+9+5x = 21+2x Then: x = 3
That all depends.Is it:ln (2x+9) = ln (5x)If it is, the solution can be found by solving 2x+9 = 5x, in which case the answer is x = 3.
(3, 3)