(5)^x-2 * (3)^2x-3 = 135
find x
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(5)x-2 × (3)2x -3 = 135
5x - 10 × 6x - 9 = 135
5x - 60x - 9 = 135
-55x - 9 = 135
-55x = 135 + 9
-55x = 144
x = -144/55
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