x = ½
x = 0.5
Step-by-step explanation:
[tex]6x + 9 = 12[/tex]
Collect like terms and simplify
[tex]6x = 12 - 9 \\ 6x = 3[/tex]
Divide both sides of the equation by 6
[tex] \frac{6x}{6} = \frac{3}{6} \\ \\ x = \frac{1}{2} [/tex]