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Aflati necunoscuta X=?

0,25[2200x(400-100)+22600000+4180(100-X)]=

Răspuns :

Bunnydance
0,25*[2200*(400-100)+22600000+4180(100-X)]=
0.25*[2200*300+22600000+4180(100-X)]=
0.25*[660000+22600000+4180(100-X)]=
0.25*[23260000+418000-4180*X]=
0.25*(2367800-4180*X)=
1/4*(2367800-4180*X)=
(2367800-4180*X)/4=5919500-1045*x => x=5919500/1045 = 5664