Question

Rezolva in Q+ urmatoarele ecuatii a) 1/2×x+1/4=1/3 b) x:3/4-1/3=1/9

Answer 1

a.  1/2×x+1/4=1/3
x/2=1/3-1/4
x/2=4/12-3/12
x/2=1/12
x=2*1/12
x=1/6

b.   x:3/4-1/3=1/9
x*4/3=1/9+1/3
x*4/3=1/9+3/9
4x/3=4/9
12x/9=4/9..../*9
12x=4
x=4/12 simplificam
x=1/3