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a in (-oo:+oo)
(-1/4)*a-(2/3) = -43/48 // + -43/48
(-1/4)*a-(2/3)-(-43/48) = 0
(-1/4)*a-2/3+43/48 = 0
11/48-1/4*a = 0 // - 11/48
-1/4*a = -11/48 // : -1/4
a = -11/48/(-1/4)
a = 11/12
a = 11/12
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