7.Solve the following system of equations:

2x + 4y + 10z
x − 2y + 5z = −4
3x −4y −3z = 15

Select the appropriate response:
A) x = 2, y = 3, z = 5
B) x = 4 y = 3, z = 5
C) x = 2, y = 3, z =9
D) Not possible to solve

The answer whould be c or b but I can be a it’s o o o I know it is A

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .