6x=7-4y; x=-2,-1,0 i dont understand in 8th grade algerbra 1 honors

I believe you have to find y by plugging in x.

6(-2) = 7 - 4y
-7         -7

-12 -7 = -4y
-19 
/-4            /-4

4.75 = y
y = 4.75

6(-1) = 7 -4y
-7         -7

-13 = -4y
/-4       /-4

3.25 = y
y = 3.25

6(0) = 7 - 4y
-7       -7 

-7  = -4y
/-4    /-4

1.75 = y
y = 1.75

The first digit is in the middle school 100s place