To find out how old Rosario is now, we can use the information provided in the first equation:
x + 6 = 18
We know that in 6 years, Rosario will be 18 years old, and we're trying to find out how old she is now. To find the value of x, we can subtract 6 from both sides of the equation:
x = 18 - 6
x = 12
So Rosario is 12 years old now.