Seven years ago, my mother was seven times older than me.
In exactly eight years from now, my mother will be two times older than me.
How old is my mother now?
+538 Say my age back then is x
So my moms back then was 7x
In 8 years, we add 15.
So 7x+15 and x+15
7x+15 is two times x+15
So 7x+15 equals 2x+30
5x=15
x=3
So back then your mother was 21.
Checking work
21+15=2(3+15)
+538 Say my age back then is x
So my moms back then was 7x
In 8 years, we add 15.
So 7x+15 and x+15
7x+15 is two times x+15
So 7x+15 equals 2x+30
5x=15
x=3
So back then your mother was 21.
Checking work
21+15=2(3+15)
