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x in (-oo:+oo)
(1/2)*m-((3/4)*n) = 8 // - 8
(1/2)*m-((3/4)*n)-8 = 0
(1/2)*m+(-3/4)*n-8 = 0
1/2*m-3/4*n-8 = 0
x należy do R
x in (-oo:+oo)
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