The equation 10 x + 12 = $72.00 shows the total cost for x people attending a concert. How many people attended the concert?

The concert was attended by 6 people

First, you have to get rid of all of the non-variable numbers except one of them.

Subtract.

72

-12

60

Now, you have 10x=$60.00

Divide both sides by 10.

60:10=6

So, the final answer you get is x=6

This means that 6 people attended the concert (that's a pretty lonely concert if you ask me).