Derivative of (3x+5/7x-4)

1. Differentiate $\left(\frac{5 x}{7} + 3 x\right) - 4$ term by term:

   1. Differentiate $\frac{5 x}{7} + 3 x$ term by term:

      1. The derivative of a constant times a function is the constant times the derivative of the function.

         1. Apply the power rule: $x$ goes to $1$

         So, the result is: $3$

      2. The derivative of a constant times a function is the constant times the derivative of the function.

         1. Apply the power rule: $x$ goes to $1$

         So, the result is: $\frac{5}{7}$

      The result is: $\frac{26}{7}$

   2. The derivative of the constant $-4$ is zero.

   The result is: $\frac{26}{7}$

The answer is:

$$\frac{26}{7}$$