00:01
Hello, in this problem we have two brothers, jack and jen, which is a girl.
00:07
And let's know jack's age as x and jen's age as y.
00:11
We have the first piece of info that jack will be two years from being twice as old as sister jen.
00:20
So in two years from now, the age of jack will be twice as much as jen.
00:26
So currently, jack needs two years on his current age to be twice as age as his sister, jen.
00:37
So that's the first equation here.
00:39
And the second equation is that jack's age and jen's age is equal to 66.
00:45
So now let's rearrange this formula here.
00:49
So we have x minus 2y...