Answer:
(1,-2)
Explanation:
x+8y=-15
7x+8y=-9
put x in right and make it a -
8y=-15-x
7x+8y=-9
use 8y to substitute into an equation
7x-15-x=-9
subtract 7x to x
6x-15=-9
add 15 to -9
6x=6
divide both sides by 6
x=1
substitute 1 to an equation
7x+1+8y=-9
solve
y=-2
(1,-2)