How do you solve 1/3x = 20 to find x

1/3x=20

1st step do the opposite of 1/3x to get it by itself. So you would do 1/3x *3/1 than you would do 3/1 *20. What you do to that side you do to the other.

2nd step 20*3=60

3rd You can check your answer by doing 1/3 *60=20

I plugged the answer in the variable to Check it

Element 17 is chlorine it is a group 7 element(halogen) and belongs to period 3 of the periodic table

Idon't know the answer