Question

aflati x stiind ca .
c)x+5 5/6-2 1/2=6 3/4
f)7 3/16-x=2 5/12

Answer 1

Răspuns:

introducem intregii in fractie si aducem fractiile la acelasi numitor comun

c)x+5intregi 5/6-2intregi 1/2=6 intregi3/4

x+(5·6+5)/6-(2·2+1)2=(6·4+3)/4

x+35/6-5/2=27/4

x=³⁾27/4+⁶⁾5/2-²⁾35/6

x=81/12+30/12-70/12

x=41/12 = 3 intregi 5/12

f)7 intregi3/16-x=2 intregi5/12

(7·16+3)/16-x=(2·12+5)/12

115/16-x=29/12

x=³⁾115/16-⁴⁾29/12

x=345/48-116/48

x=229/48 = 4 intregi 37/48