How to solve the equation of 7 / 15 × 29?

How to solve the equation of 7 / 15 × 29?

7/15×29
=7/15×(30-1)
=7/15×30-7/15×1
=14-7/15
=13 and 8 / 15

Six out of seven of a number is 2.6 less than the reciprocal of five out of nineteen

Six out of seven of a number is 2.6 less than the reciprocal of five out of nineteen
Let this number be X
6x / 7 = 19/5 -2.6
6x = 19x7 /5 - 18.2
6x =8.4
x = 1.4

When k is the value, the solutions of equation 3 (2x-1) = 1-2x and 8-K = 2 (x + 1) are reciprocal

3（2x-1）=1-2x
6x-3=1-2x
8x=4
x=0.5
So the solution of 8-K = 2 (x + 1) is 2
8-k=2（2+1）
8-k=6
k=2

The solutions of the equation - x + 2 = 2 (x-k) and 2x + 1 = x + 2 of X are reciprocal to each other

2X + 1 = x + 2, the solution is: x = 1, substituting x = 1 into - x + 2 = 2 (x-k) to get: - 1 + 2 = 2 (1-k), the solution is: k = 12