Question

X=-4
–7x + 5y = 13
what is Y?

Answer 1

3

Explanation:

This is how you will do:

-7x(-7x-4)+5y=13

=28+5y=13

Pass 13to the other side across the mark , that will change the sign to make it negative (28-13=5y)

15=5y divide all sides by 5 to leave the answer as 3=y

Answer 2

-7x + 5y = 13
-7(-4) + 5y = 13
28 + 5y = 13
5y = 13 - 28
5y = -15
y = -15/5
y = -3