Answer:
y = -2, y = -5, x = 20, x = -12
Explanation:
When dealing with unknown y values, rearrange the equation so that y is isolated:
y + 5 = x/4 >>> subtract 5 from both sides >>> y = x/4 - 5
Now, substitute in your values for y in the table:
12/4 - 5 = -2
0/4 - 5 = -5
Now, to deal with unknown y values, rearrange so that y is instead isolated:
y + 5 = x/4 >>> multiply both sides by 4 >>> 4y + 20 = x
Substitute!
4(0) + 20 = 20
4(-8) + 20 = -12