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2X - 14 = -4X + 4
2X = -4X + 18
6X = 18
X = 3
4 - 10X = -66
4 - 10X + 66 = -66 + 66
10 (-X + 7) = 0
10 = 0 o -X + 7 = 0
No hay solución o X = 7
X = 7
6 + 3X = X + 4
3X + 6 = X + 4
3X = X - 2
2X = -2
X = -1
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