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Resolvemos :
x - 2 (15) = 36
x - 30 = 36
x = 36 + 30
x = 66
Solución : El número es = 66
El doble de 15 es: 30
entonces:
x-30=36
acomodamos terminos semejantes:
x=36+30
x=66
El numero es 66.
COMPROBAMOS:
x-30=36
66-30=36
36=36
Saludos cordiales, me alegra haberte ayudado!