Question 242570
Let daughter = x
Let mom = x+20
.
In 11 years mom will be 3 years less than twice her daughter's age.
So, in 11 years mom will be (x+20)+11 and her daughter will be x+11, right?
Therefore, the equation would be:  {{{(x+20)+11=2(x+11)-3}}}
Now solve for x to find the daughter's age, then add 20 to find mom's age.
.
I'll let you take it from here.  :)