Question

URGENT!!!! faceți-mi si mie rezolvarea acestui Exercițiu: 4-2x/4 =4/5 • [0,8(3) -0,75]. Coroana. multumesc anticipat.

Answer 1

0.8(3)=(83-8)/90=75/90=5/6
0.75=75/100=3/4

4-x/2=4/5*5/6-4/5*3/4
se simplifica 5 cu 5 si 4 cu 4 si devine:
4-x/2=2/3-3/5
-x/2=2/3-3/5-4
inmultim tot cu -2 si devine:
x=8+6/5-4/3
aducem la acelasi numitor
x=8*15/15+18/15-20/15=(120+18+20)/15=158/15=10.5(3)