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x = 4.500
x= 4.500
No sé si te refieras a eso :(
2X = X - 2.000 + 6.500
2X - X = 4.500
X = 4.500.
Compruebo:
2(4.500) - 6.500 = 4.500 - 2.000
9.000 - 6500 = 2500
2500 = 2500