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z in (-oo:+oo)
(-3/4)*(z-11)-((1/8)*z) = 0
(-3/4)*(z-11)+(-1/8)*z = 0
-3/4*(z-11)-z/8 = 0
(-3/4*8*(z-11))/8-z/8 = 0
-3/4*8*(z-11)-z = 0
66-7*z = 0
(66-7*z)/8 = 0
(66-7*z)/8 = 0 // * 8
66-7*z = 0
66-7*z = 0 // - 66
-7*z = -66 // : -7
z = -66/(-7)
z = 66/7
z = 66/7
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