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x -3× + 8 + 10× - 2 = 2× -14
restamos -8 y sumamos 2 a cada lado:
x -3× +10× = 2× -14 - 8 + 2
restamos -2x a cada lado:
x -3× +10× - 2x = -14 - 8 + 2
11x - 5x = -22 + 2 = -20
6x = -20
x = -20/6