5×х+3×(х+9)=75

5×х+3×(х+9)=75

To solve this equation, we can simplify it first.

First, distribute the multiplication: 5х + 3х + 27 = 75

Then, combine like terms: 8х + 27 = 75

Next, isolate the variable х by subtracting 27 from both sides of the equation: 8х = 75 - 27 8х = 48

Finally, divide both sides by 8 to solve for х: х = 48 / 8 х = 6

Ответ: х = 6