Question

реши уровнения и сделай проверку ​

Answer 1

1/x + 3/(2 2/5 * x) = 3/4

1/x + 3/(2 2/5 * x) = 3/4, x = 0

1/x + 3/(12/5 * x) = 3/4

1/x + 3/((12x)/5) = 3/4

1/x + 5/(4x) = 3/4

9/(4x) = 3/4

36 = 12x

12x = 36

x=3,x =сверху это палочка/0

x = 3

2)1/x - 2/(4 2/3 * x) = 2/7

1/x - 2/(4 2/3 * x) = 2/7, x = 0

1/x - 2/(14/3 * x) = 2/7

1/x - 2/((14x)/3) = 2/7

1/x - 3/(7x) = 2/7

4/(7x) = 2/7

28 = 14x

14x = 28

x=2,x (ne) когда такое пиши = и сверху такая палочка /0

x = 2

надеюсь правельно без-обид