Answer:
The linear equation for the total combination age is [tex]X+7+(X+4)+7=24[/tex]
Step-by-step explanation:
If Jane is X years old today. And her brother is 4 years older then her brothers age is,
X+4.
Jane's age after 7 years = X+7
Jane's Brothers age after 7 years = (X+4)+7
So after seven years their combined age will be 24, Lets write this in an equation form,
[tex]X+7+(X+4)+7=24[/tex]
So the linear equation for the total combination age is,
[tex]X+7+(X+4)+7=24[/tex]