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x-45%
100x=36000 / : 100
x=360
x=p tylko ze to wartosc 45% w zl
800-360=440=K
2. x-12%
600-100%
100x=7200/ : 100
x=72
600+72=672 =R
3.800-100%
750-x%
880x=75000/ :800
x=93,75%=P