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IIr- 7420+0,06*7420=7865,2
IIIr-7865,2+0,06*7865,2=8337,11
Tak mi jakoś wyszło, mam nadzieje że dobrze xD
x - 6%
x= 7000×6÷100
x=420
7420-100%
x- 6%
x= 7420×6÷100
x=445.2
7420+445.2=7865.2
7865.2-100%
x- 6%
x=7865.2×6÷100
x=471.91
7865.2+471.91=8337.11 zł
znajdzie sie 8337.11 zl