Question

Media nr.2/5,1/10,x +1 este 5/8

Answer 1

(2/5  + 1/10 + x+1) : 3  = 5/8

(2/5 + 1/10 + x+1= 5/8 · 3=15/8

aducem prima parte la acelasi numitor, 10

4/10 + 1/10 + 10(x+1)/10 = 15/8

(4+1+10x +10) / 10 = 15/8

(15+10x) / 10 = 15/8

15/10+10x/10 = 15/8

10x/10=15/8-15/10

x=15/8-3/2

x=15/8-12/8=3/8

x=3/8