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8X+4 = 15X+10
8X-15X = -4 +10
-7X = 6
X=
Esa es tu respuesta.
8x / 4 = 2x; + 4 / 4 = + 1
8x + 4 = 4 (2x + 1)
15x + 10: Sacando factor común 5:
15x / 5 = 3x; + 10 / 5 = +2
15x + 10 = 5 (3x + 2)