X+1=10

i need with this problem!

X+1=10

move +1 to the other side

sign changes from +1 to -1

to get X by itself

X+1-1=10-1

X=10-1

X=9

1,800

Step-by-step explanation: At a concert, 20% of the audience members were teenagers. If the number of teenagers at the concert was 360, what was the total number of audience members? x = ? If you divide 360 by 20% it will give you 1,800 audience members.