Start with the sum of x and 9, giving the expression [tex]x + 9[/tex] This is divided by 2 so [tex] \frac{x + 9}{2} [/tex] This equals 3x so the equation is [tex] \frac{x + 9}{2} = 3x[/tex] This can the be solved. Multiply both sides by 2 to get [tex]x + 9 = 6x[/tex] Then take x from both sides [tex]9 = 5x[/tex] Divide by 5 to get the value for x [tex]1.8 = x[/tex]
