Question

20 баллов решите плиз,уравнение: х-(16 8/21 - 5) = 10 1/3,срочно ребят!

Answer 1

х-(16 8/21 - 5) = 10 1/3
x - 11 8/21 = 10 1/3
x = 10 1/3 + 11  8/21
x = (10+11)+(1/3+8/21) = 21 + (3*7+8/21) = 21 15/21 = 21 5/7
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проверка
21 5/7 -(16 8/21 - 5) = 10 1/3
21 5/7 - 11 8/21 = 10 1/3
(21-11)+(5/7 - 8/21) = 10 +( 5*3-8/21)= 10 + 7/21 = 10 7/21 = 10 1/3

верно!

Answer 2

$x-left(cfrac{344}{21}-5right)=cfrac{31}{3}\x-cfrac{239}{21}=cfrac{31}{3}\x=cfrac{31}{3}+cfrac{239}{21}=cfrac{152}{7}=21cfrac{5}{7}$
Выполним проверку:
$cfrac{152}{7}-cfrac{239}{21}=cfrac{31}{3}\cfrac{31}{3}=cfrac{31}{3}$
Все выполнено верно