Question

Help with filling in the blanks...

See attachment!
http://static.k12.com/calms_media/media/241500_242000/241756/1/9589ffefffb0048a7b694c993ca1e0c65b4ca07d/07_10_UT_10.gif

Answer 1

If I have this equation:
x+3=7
Can I do this:
x+3+(-3)=7+(-3)

Answer 2

Yeah, but then you are just solving for "x". I really suck at trying to see it in letters instead of numbers.

Answer 3

How can I do that? What property says I can add the same number to both sides of an equation?