3x + 2(4x - 5) = 13

Sure, let's solve the equation step by step:

1. Distribute the 2 in the parentheses: 2 * 4x - 2 * 5 = 8x - 10. So, the equation becomes: 3x + 8x - 10 = 13.

2. Combine like terms on the left side of the equation: 3x + 8x = 11x. So, the equation becomes: 11x - 10 = 13.

3. Add 10 to both sides of the equation to isolate the term with x on one side: 11x - 10 + 10 = 13 + 10. So, the equation becomes: 11x = 23.

4. Divide both sides of the equation by 11 to solve for x: 11x / 11 = 23 / 11. So, the solution is: x = 23 / 11 = 2.09 (rounded to two decimal places).