help pe 12,13
Repede dau coroana!!!! PLS!

12.
a)[tex] \frac{abc}{10} = 43.1 + 3.9 + 1.2[/tex]
=>
[tex] \frac{abc}{10} = 47 - 1.2 = 45.8[/tex]
abc=10×45.8
abc=458
b)
[tex] \frac{abcd}{100} = 5.71 + 12.91 - 7.52 = 11.1[/tex]
abcd=1110