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3x + 1 - 2x = 9 - 3
x + 1 = 6
x = 6 - 1
x = 5
6 + 2x - 4 = x - 1
2x + 2 = x - 1
2x - x = - 1 - 2
x = - 3
- 6 - 2x = - 3x - 6
- 2x + 3x = - 6 + 6
x = 0
3x - 2x = 9 - 3 - 1
x = 5
Verificacion:
3x + 1 - 2x = 9 - 3
3*5+1-2*5 = 9-3
15 +1-10 = 6
16 -10 =6
6 =6