12. If "auto" is set as the value fo r one of the seven properties in an element that is inline or floating, it will be treated as if it were set to zero.
If statement #12 above is passed, then:
This text is emphasized, and "em" is an inline element. The value of
"margin-left" is "auto" in the CSS1 rules, so "margin-left" will be set
to 0, and this text should have no left margin. The right margin should
be 50px.
The rules applied are:"em {margin-left: auto;
margin-right: 50px;
}"
This image has a left float, and the value of "margin-right" is "auto"
in the CSS1 rules, so "margin-left" will be set to 0, and this text
should have no right margin. The left margin should be 50px.
The rules applied are:"img {float: left;
margin-left: 50px;
margin-right: auto;
}"
All other properties should be UA-default.
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