0
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
4y - 4 + 3a + 7 - 6a - 4 = 4y -1 - 3a
4y-4+3a+7-6a-4=4y+3a-6a-4+7-4=4y-3a-1
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