Final answer:
To solve the equation 6 + 0.09x = 12, subtract 6 from both sides, then divide by 0.09, and round the answer to two decimal places to get x = 66.67.
Step-by-step explanation:
To solve the equation 6 + 0.09x = 12, we need to isolate the variable x. We can do this by first subtracting 6 from both sides of the equation which will give us 0.09x = 6. Next, to solve for x, we divide both sides by 0.09 to get x by itself. Therefore, x = 6 / 0.09, which gives us x = 66.6666667.
Finally, we round our answer to two decimal places, so the solution is x = 66.67.