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5x +25 = 110 : 2
5x = 55 - 25
5x = 30
x = 30 : 5
x = 6
Verificacion
5* (x + 5) = 120 - 10 : 2
5* (6 + 5)= 55
5*6 + 5*5 = 55
30 + 25 = 55
55 = 55