Write the system of equations as a matrix equation AX=B, with A as the coefficient matrix of the system.
4x+2y-6z=1
-6x-y-z=7
-4x+7y+6z=1

X
?Y=?
Z

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle