Question

Please help.
Algebra.

Answer 1

Answer 3 is (0, 5)
Answer 4 is in comments.

Answer 2

the first one should be (0,-5)

the second should be (-2,1)

Explanation:

You substitute the given value of y into your equation. 6x-y=5

6x-(-6x-5)=5

x=0

y=-6 * 0-5

y=-5

(x,y)=(0,-5)

AND

7x-6(4x+9)=-20

x=-2

y=4x(-2)+9

y=1

(-2,1)

hope this helps!