Which statement is true about the system x3y2 and yx6 1 8 2
Which statement is true about the system x-3y=2 and y=x+6?
1. (8, 2) is not a solution to either equation, so it is not a solution to the system.
2. (8, 2) is a solution to one equation but not the other one, so it is a solution to the system.
3. (8,2) is a solution to both equations, so it is a solution to the system.
4. (8, 2) is a solution to one equation but not the other one, so it is not a solution to the system.
Solution
x-3y=2 ----(1)
and y=x+6 ----(2)
equation 2) y -x =6
Now add the two equations we get :
-2y = 8 ---> y = -4
x = y -6 = -4 -6 = -10
( x , y) ---> ( -10 , -4)
So, ( 8, 2) is a solution to : x -3y =2 ----> 8 -3*2 = 2 is a solution
y = x+6 : ---> 2 =10 is not a solution to this equation
So, Option 4) (8,2) is a solution to one equation but not the other one, so it is not a solution to the system.
