To solve the equation, we can start by simplifying both sides:

1,5x:(9-613/21) = 113/50

First, let's simplify the expression on the left side:

9 - 613/21 = 9 - 29 = -20

Now, the equation becomes:

1,5x/(-20) = 113/50

To get rid of the fraction on the left side, we can multiply both sides by -20:

(-20)(1,5x/(-20)) = (-20)(113/50)

This simplifies to:

1,5x = (-2260)/50

Next, we can simplify the right side:

(-2260)/50 = -113/5

Now, the equation becomes:

1,5x = -113/5

To solve for x, we can divide both sides by 1,5:

(1,5x)/(1,5) = (-113/5)/(1,5)

This simplifies to:

x = (-113/5)/(3/2)

To divide fractions, we can multiply the first fraction by the reciprocal of the second fraction:

x = (-113/5) * (2/3)

Multiplying the numerators and denominators:

x = (-226/15)

Therefore, the solution to the equation is x = -226/15.