Question

solve using elimination
2x+3y=9
x+5y=8

Answer 1

multiply second equation by -2
add the 2 equations together
no more x variable

Answer 2

multiply the second equation by -2 to get:
-2x-10y=-16

Answer 3

you will have:
2x+3y=9
-2x-10y=-18

Answer 4

if you add those two equation like @DanJS said
2x+3y=9
-2x-10y=-18
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0-7y=-9
solve for y
once you have y
look for x in one of the equations you started with