Elle is 23 years old.
her mother is 58 years old.
in how many years will elle's mother be twice as old as elle?

Let, the number of Years = x
Then, (58 + x) = 2(23 + x)
58 + x = 46 + 2x
2x - x = 58 - 46
x = 12

In short, After 12 Years,Elle's mother be twice as old as Elle

Hope this helps!

4+2=-2. 1+2=3. y=-2/3x+b. 2=4/3+b. 2/3=b. the answer is y= -2/3x+2/3