Răspunsuri

2014-06-11T23:01:53+03:00
A+b=280-205
a+b=75

b-3/4=a  aducem la acelasi numitor
4b-3=4a

a=(4b-3)/4

(4b-3)/4 +b =75   aducem la acelasi numitor

4b-3+4b=300
8b=300+3
8b=303
b=37,875

a=(4*37,875-3)/4=  148,5/4=  37,125

(3a+2b)/(205/41)=

(3*37,125+2* 37,875) supra 205/41

(111,375+75,75) supra 205/41=

187,125 supra 205/41

187,125= 187 intregi 125/1000= 187 intregi 1/8=  1497/8

1497/8 * 41/205=  61 377/1640=  37,425
multumesc dartrebuie rezolvare pt clasa a 4 a.