Răspunsuri

2014-08-11T17:13:12+03:00
4x/5 = 15 /10 [ (16-1/90*x)/5 + 10/9]  | *5 =>
4x = 15/2 [ ( 15/90 * x ) /5 + 10/9 ] =>
4x = 15/2 [(1/6*x)/5+10/9] =>
4x=15/2(x/6* 1/5+10/9) =>
4x=15/2(x/30+10/9) => (amplificam x/30 cu 3 si 10/9 cu 10)
4x = 15/2 ( 3x/90 +100/90) =>
4x=15/2 * (100+3x)/90 => simplificam prin 15 =>
4x = 100+3x /12 | *12 => 48x = 100 + 3x => 45x = 100 => x = 100/45 => x=50/9 =>
x=5 intregi 5/9