Question

(7/12+9/12+8/12-2) +X = 2/5+1+3/5

Answer 1

$(\frac{7}{12}+\frac{9}{12} + \frac{8}{12}-2)+x=\frac{2}{5}+1+\frac{3}{5}$
Amplificam pe 2 cu 12
Amplificam pe 1 cu 5

$(\frac{7}{12} + \frac{9}{12} + \frac{8}{12} - \frac{24}{12}) + x = \frac{2}{5} + \frac{5}{5} + \frac{3}{5} \\ x = \frac{10}{5} \\ x = 2$