Предмет: Математика, автор: masha734

помогите решшить задачу 15.25

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Автор ответа: yarovoe
0
х кг-ржаная мука,(х+4)кг -пшеничная мука,х+Х+4=20,2х+4=20
2х=20-16,2х=16,х=16:2,х=8(кг)- ржаная мука,20-8=12(кг) пшеничная мука.
(8/20)*100=800/20=40%-ржаной муки
 100%-40%=60%-пшеничной муки
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