Question 1030419
I'll show you the first one...resubmit the others if you still don't get it...
Okay, from
2x+y=-9
3x+y=11
we solve the first one for y and plug that into the second one...like this:
y = -2x - 9
3x + (-2x - 9) = 11
x - 9 = 11
x = 20
and then
y = -2(20) - 9 = -49
(20, -49)