What’s the answer to this

Solve: 3x+y=6 4x-2y=18 show all work !

Ineed someone to me answer my question i have to have this done and knocked out

]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