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la segunda sale 9 esa es facil
6x/8 = 8 - 2
6x/8 = 6
6x = 6 (8)
6x = 48
x = 48/6
x = 8
Solución :
x = 8
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4x - 7 = 2x + 25
4x - 2x = 25 + 7
2x = 32
x = 32/2
x = 16
Solución :
x = 16