Question 797235
Rose is 2 years older than her brother.
R = 2B
If their age added together is 30 years.
R + B = 30
Replace R with 2B from first equation.
2B + B = 30
3B = 30
B = 10
Currently;
Rose is 20 years old.
Her brother is 10 years old.
Hope this helps.
:-)