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5x-3x-6=15
Usa a propiedade distributiva para multiplicar -3 por x+2.
2x-6=15
Combina 5x e -3x para obter 2x.
2x=15+6
Engadir 6 en ambos lados.
2x=21
Suma 15 e 6 para obter 21.
x=\frac{21}{2}
Divide ambos lados entre 2.