Question 134131
Let's assigned "x" = age of Rose  at present
So, "x + 10" = age of Ralph  at present
But in 3 years from now the sum of their ages will be 28.
So, we need to add 3 years on their present age and the sum will equal to 28.
To show that,
x+3 (age of Rose) + x+10+3 (age of Ralph) = 28 (equation 1)
2x+16=28
2x=28-16
x=6 This will be the age of Rose at present
For Ralph, x+10 = 16 age at present
To check 3 years from now, we go back to equation 1 above:
x+3+x+10+3=28
6+3+6+10+3=28
28=28
Very good!