solve -16x-2y=-18 and 8x+y=9 by elimination

Answer 1

-16x-2y=-18
8x+y=9

Multiply the 2nd by 2 to get

-16x-2y=-18
16x+2y = 18

These are the same line. There are infinitely many solutions. Any point on one line is also on the other, as the lines coincide.

Answer 2

so after that do u add the two problems together?