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400÷{ [ 1140-(5045÷a-909) ] ÷ 130}÷10=5. va rog mult

Răspuns :

400:{[1140-(5045:a-909)]:130}:10=5 400:{[1140-(5054:a-909)]:130}=50 [1140-(5054:a-909)]:130=8 1140-(5054:a-909)=1040 5054:a-909=100 5054:a=1009 a=5054:1009 a=5,008...