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x+(x+5)>65
x+x+5>65 31+(31+5)>65
2x+5>65 31+31+5>65
2x>65-5 67>65
2x>60 Se cumple la desigualdad
x>60/2
x>30
x + (x + 5) > 65
x + x + 5 > 65
2x + 5 > 65
2x > 65 - 5
2x > 60
x > 60/2
x > 30
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30
Solucion.
x∈ (30, infinito)