What is the answer for 4y-4 plus 3a plus 7-6a-4?

4y - 4 + 3s + 7 - 6a - 4 = 0

4y + 3s + 7 - 6a - 4 = 4

4y + 3s - 6a - 4 = 4 -7

4y + 3s -6a = 4 - 7 + 4

4y + 3s - 6a = -3 + 4

4y + 3s - 6a = 1

y + 3s - 6a = 1/4

y = -3s + 6a + 1/4

3s = -y + 6a + 1/4

s = -1/3y + 6a + 1/4

-6a = -1/3y + a + 1/4

-a = -1/3y x 1/6 + a + 1/4 x 1/6

a = 1/18y - 1 - 1/24

a = 1/18y - 25/24