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-10x + 7 = 17 - 8x
+8x - 10x = 17 - 7
- 2x = 10
x = 10 / 2
X = 5
4x - 3 + 9x =-3
5x - 3 = - 3
5x = -3 + 3
5x = 0
X = 5 / 0
x = 0
espero Que Te Sirva Mucho Salu2