09/04/12
when you subtract a variable from a whole number and a variable:example x+23=2x+45 why does the 2x become 0?
I need to understand the rules of basic algebra. I understand the answer, I need to understand why it is the answer. x+23=2x+45
x-x+23=2x-x+45
23=x+45. why does the 2x become just x...
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