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(x:25+21)x6-222=0

(x+1)+(x+2)+....(x+23)=943



Răspuns :

(x:25+ 21)×6=222(schimbi semnele cand treci numarul in partea opusa)
x:25+ 21=222:6=37
x:25=37-21=16
x=16×25=400

in total sunt 23 de termeni de "x"
desfacem parantezele: x×23+ 1+ 2+ ...+ 23=943
1+2+ 3+ ...+ 23(suma Gauss)=(23*24):2=276
x×23+ 276=943
x×23=943-276=667
x=667:23=29