Question

Y = -3
x - 5y = 7
I have the answer I don’t know how to show my work

Answer 1

Explanation:

To use substitution in this problem, you find the Y which ='s -3. That we have clear. Now, the second equation becomes x - 5(-3) =7. A negative times a negative is a positive, so 15. Now, we have x + 15 = 7. Subtract 15 from 7 to get x = -8. Your coordinates, or your answer, will be (-8, -3)

Answer 2

(x, y) = (-8, -3)

Explanation:

"Show your work" means write down the work you did.

Very likely, you put -3 where y is in the second equation. That is what "substitution" means.

x -5(-3) = 7

x +15 = 7 . . . simplify

x = -8 . . . . . subtract 15 from both sides

The solution to this system is ...

(x, y) = (-8, -3)