[tex]1) 0,(27)= \frac{27}{90}= \frac{3}{10} \\ \\ \frac{3}{10} * \frac{1}{x} =3 <=> \frac{3}{10x}=3 => 30x=3 \\ \\ \boxed{x= \frac{1}{10} }[/tex]
[tex]2)map= \frac{ \frac{2}{5} * 10 + \frac{1}{3} *6 + 4 \frac{5}{10} *4 }{10+6+4} = \frac{ 2*2 +1*2 + 4 \frac{1}{2} *4 }{20} = \frac{ 4+2+ \frac{9}{2} *4 } {20} \\ \\ map= \frac{6+ 9*2}{20} = \frac{24}{20} \\ \\ \boxed{map= 1,2}[/tex]
[tex]3) x -\ masura \ unghiului \ \\ x= 3(180-x) \ <=> \ x= 540 -3x \ <=> \ x+3x=540 \\ 4x=540 \\ \\ \boxed{x=135}[/tex]
[tex]4) |x-1|+|1-x|=4 \\ x-1-1+x=4 \\ 2x-2=4 \\ 2x= 4+2 \\ 2x=6 \\\\ \boxed{x=3}[/tex]
[tex]5)x-nr \ de \ gaini \\ y- \ nr \ de \ iepuri \\ \\ x=2y \\ \\ 2x+4y=80 <=> 2*2y+4y=80 \\ 4y+4y=80 \\ 8y=80 \\ \\ \boxed{y=10 \ iepuri} \\ \\ x=2*10 \\ \\ \boxed{x=20\ gaini}[/tex]
