In the △ABC shown, D is some interior point, and x,y,z,w are the measures of angles in degrees. Solve for x in terms of y,z and w.
[asy]
draw((0,0)--(10,0)--(2,7)--cycle);
draw((0,0)--(4,3)--(10,0));
label("A", (0,0), SW);
label("B", (10,0), SE);
label("C", (2,7), W);
label("D", (4,3), N);
label("x", (2.25,6));
label("y", (1.5,2), SW);
label("z", (7.88,1.5));
label("w", (4,2.85), S);
[/asy]
<spanclass=′latex−bold′>(A)</span>w−y−z<spanclass=′latex−bold′>(B)</span>w−2y−2z<spanclass=′latex−bold′>(C)</span>180−w−y−z<spanclass=′latex−bold′>(D)</span>2w−y−z<spanclass=′latex−bold′>(E)</span>180−w+y+z