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a in (-oo:+oo)
((1/4)*a-12)/8 = 4 // - 4
((1/4)*a-12)/8-4 = 0
(1/4*a-12)/8-4 = 0
(1/4*a-12)/8+(-4*8)/8 = 0
1/4*a-4*8-12 = 0
1/4*a-44 = 0
(1/4*a-44)/8 = 0
(1/4*a-44)/8 = 0 // * 8
1/4*a-44 = 0
1/4*a-44 = 0 // + 44
1/4*a = 44 // : 1/4
a = 44/1/4
a = 176
a = 176
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