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4 -5X=-2X+19
-3X=15
X= - 5
10x - 7 = 10x + 6
10x - 10x = 6 + 7
0x = 13
No existe solución.
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- 4 + x + 8 - 6x = - 2x + 19
4 - 5x = - 2x + 19
- 5x + 2x = 19 - 4
- 3x = 15
x = 15/-3
x = - 5
Solución :
x = - 5