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(9x + 6)/3 + 2 = 13
(9x + 6)/3 = 13 - 2
(9x + 6)/3 = 11
9x + 6 = 11 (3)
9x + 6 = 33
9x = 33 - 6
9x = 27
x = 27/9
x = 3
Solución :
x = 9