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(22*a)/b = (7*c)/d // - (7*c)/d
(22*a)/b-((7*c)/d) = 0
(22*a)/b-7*c*d^-1 = 0
22*a*b^-1-7*c*d^-1 = 0
x należy do R
x in (-oo:+oo)
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