Answer:
The point is not a solution of the two equations
Explanation:
2x+y=4
y=-2x+4
Subsitute it into the other equation
2x+7(-2x+4)=14
2x-14x+28=14
-12x+28=14
-12x=-14
x= 7/6 or 1.17
Plug this back into the original equation
y=-2x+4
y=-2(1.17)+4
y=1.66
The solution of these two equations is (1.17, 1.66) which doesn't match the given point of (4,-4), so the point is not a solution of the two equations.