Question

Решите уравнение. (4 8/21+z)-7 13/21=2 12/21

Answer 1

4 8/21 + z = 2 12/21 + 7 13/21
4 8/21 + z = 9 25/21 = 10 4/21
z = 10 4/21 - 4 8/21 = 9 25/21 - 4 8/21
z = 1 17/21

Answer 2

4 8/21+z=2 12/21+7 13/21
z=10 4/21-4 8/21
z=5 17/21

Answer 3

Для начала приведем дроби к общему знаменателю, который равен 21:

(4 + 8/21 + z) - 7 + 13/21 = 2 + 12/21

Теп