Question

Toate ex!
Mersi!
Dau coroana!

Answer 1

Răspuns:

j) aducem la acelasi numitor 24

$\frac{12x- 12*24}{24}$= $\frac{13}{24}$         12x= 13+ 288= 301     x=$\frac{301}{12}$

l) 12x= 11- 3*3     12x= 11-9=2    x= $\frac{2}{12} = \frac{1}{6}$

n) $\frac{4x}{5}$= $\frac{1}{10}$ + $\frac{5*1}{10}$      $\frac{4x}{5}$= $\frac{6}{10}$   x= $\frac{6}{10} * \frac{5}{4}$ = $\frac{3}{4}$

p) x= $\frac{8}{9}$ *$\frac{3}{2}$   = $\frac{4}{3}$

r) $\frac{5x}{6}$ = $\frac{1}{4}$ + $\frac{2*1+1}{2}$        $\frac{5x}{6}$ = $\frac{1+ 3*2}{4}$ = $\frac{7}{4}$       => x=  $\frac{7}{4}$ * $\frac{6}{5}$ = $\frac{21}{10}$= 2,1