Question 130494
Let k= Katie's age now, a= Anne's age now.
k-4=2(a-4)
k-4=2a-8
k-2a=-4
.
k=a+6
.
a+6-2a=-4 Substitute a+6 for k in the 1st equation.
-a=-10
a=10 y.o.
k=10+6=16 y.o.
.
Ed