Answer:
Ralph's age now is 12 years
Explanation:
This problem bothers on word problem
Step one
Let us begin by stating The problem Mathematically
Let Sara's age be x
1. Ralph is 3 times Sara's age =3x
2. In 4 year's time Ralph will be twice Sara's age
I.e 3x+4= 2x
Let's solve for Sara's age
3x+4= 2x
3x-2x=-4
x=-4
Since it is age we can't have a negative symbol
x+4
To find Ralph's age we use statement 1
Ralph is 3 times Sara's age
3x= 3(4)= 12
Hence Ralph is 12 years old currently