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36x+99=3x+165
33x=66
x=2
4(X + 5)² - (2X + 1)² = 3(X - 5) + 180
4(X² + 10X + 25) - (4X² + 4X + 1) = 3X - 15 + 180
4X² + 40X + 100 - 4X² - 4X - 1 = 3X + 165
36X + 99 = 3X + 165
36X - 3X = 165 - 99
33X = 66
X = 2 ===> RESPUESTA
MUCHA SUERTE...!!!