Question

9x +5y=34
8x-2y=-2

solve by elimination

Answer 1

(9x+5y)=34
(8x-2y)=-2
You need to eliminate a variable so first pick either x or y to eliminate. I'll choose y. To eliminate y from the equations, you need to multiply by numbers that will give you zero y when you add the equations together:
2(9x+5y)=34*2
5(8x-2y)=-2*5
18x+10y=68
40x-10y=-10 See how when you multiplied the top eq by 2, you got 10y, and when you mult the bottom eq by 5 you got -10y? Now they'll cancel when you add the two eq together
58x=58 divide by 58
x=1 Now take this and substitute it for x in one of the eq at the beginning to get the value of y.
9(1)+5y=34
9+5y=34
5y=35 subtracting 9 from both sides
y=7 dividing both sides by 5
So the answer is (1,7)
If you have more questions please respond to this post.

Answer 2

Sorry, silly error...
5y=25
y=5
(1,5)

Answer 3

8x+3y=4
-7x + 5y=-34

Answer 4

You messed up. It is (1,5) not (1,7)