rozwiąż równanie : (minus dwie piąte x) = 5
-2/5 x=5 /*(-5/2)
x=-25/2
x=-12,5
==============================================
-⅖x=5 /:(-⅖)
x=5*(-5/2)
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-2/5 x=5 /*(-5/2)
x=-25/2
x=-12,5
==============================================
-⅖x=5 /:(-⅖)
x=5*(-5/2)
x=-25/2
x=-12,5