You add the equations to get rid of one variable, then you have 6x=24 then you divide both sides and you have x=4, then you substitute the given value of x and you are left with 5*4 – y = 9. And the solution or well possible solution is y = 11 which gives youuuuu. (x , y) = (4 , 11)
4 + y = 15….1
20 – y = 9…..2
….1*5
20 + 5y = 75….3
….3 – …..2
4y = 60
y = 15
the answer for (?) is 15
i’m not sure if this 100% correct but i’m trying my best to help you
The ? Is 11.
You add the equations to get rid of one variable, then you have 6x=24 then you divide both sides and you have x=4, then you substitute the given value of x and you are left with 5*4 – y = 9. And the solution or well possible solution is y = 11 which gives youuuuu. (x , y) = (4 , 11)